Patent Publication Number: US-8990067-B2

Title: Machine translation into a target language by interactively and automatically formalizing non-formal source language into formal source language

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     This is a U.S. National Stage under 35 USC 371 of the International Application PCT/CN2010/080353, filed Dec. 28, 2010. 
     BACKGROUND OF THE PRESENT INVENTION 
     1. Field of Invention 
     The present invention relates to a method of machine translation and a system of machine translation, and more particularly to a method of machine translation and a system of machine translation based on formalization processing. 
     2. Description of Related Arts 
     The inventor began his research on artificial intelligence (computer simulation of human intelligence) at the end of the 1970s. The core of artificial intelligence is knowledge processing (acquisition and use of knowledge); the basis of knowledge processing is knowledge representation (formal representation of commonsense knowledge and professional knowledge). A knowledge representation method for formally representing commonsense knowledge and professional knowledge (especially commonsense knowledge) universally and fully is a major problem that the artificial intelligence world has been eager to solve for a long time. 
     Natural language understanding technology aimed at natural language man-machine interface (natural language communication between a user and a computer) is an important technology of artificial intelligence. The basis of natural language communication between a user and a computer is formalizing a non-formal natural language. A method for formalizing a non-formal natural language is a major problem that the artificial intelligence world has been eager to solve for a long time. 
     Machine translation technology is an important technology of artificial intelligence. A method of machine translation which makes a substantial breakthrough in translation quality is a major problem that the artificial intelligence world has been eager to solve for a long time. The existing machine translation mainly includes the following two categories: machine translation based on direct transformation from a source language into a target language and machine translation based on an intermediate language. A machine translation system based on direct transformation from a source language into a target language performs in turn transformation at the word level, transformation at the lexical level, transformation at the syntactic level, transformation at the semantic level, and transformation rules apply only to a specific pair of languages. A machine translation system based on an intermediate language maps a source language onto an assumed intermediate expression first, and then maps the intermediate expression onto a target language. So far, there has been no universal intermediate language. No existing method of machine translation makes a substantial breakthrough in translation quality. The inventor holds that formalizing a non-formal source language is the basis of high-quality machine translation and that no existing method of machine translation makes a substantial breakthrough in translation quality just because no existing method of machine translation formalizes a non-formal source language. 
     In 1988, the inventor published a paper entitled  Meaning Formalization: A Theory about Natural Language Understanding, Automatic Translation, Knowledge Representation  at a symposium on natural language understanding of the Chinese Association on Artificial Intelligence (CAAI). 
     In 1989-1991, the inventor as a visiting scholar of the Intelligence Technologies and Systems Laboratory of Tsinghua University, cooperating with a computer worker and using the machine translation method described in the above paper, developed an experimental Japanese-Chinese machine translation system, which translated correctly a number of long sentences of complicated structure. 
     In 1998, the inventor submitted an application to the Patent Office of China for a patent on the invention “the Meaning Formalization Method of Automatic Translation” (application number: 98110793.1). The invention was a development of the machine translation method described in the above paper. It had the following main technical features: 1 Translation modes are stored in a computer storage; a combination mode of a source language and a number of corresponding transformation modes for transforming the source language into a number of target languages constitute a translation mode; a combination mode contains grammatical attribute marks and semantic attribute marks of the component segments and contains a grammatical attribute mark and a semantic attribute mark of the composed segment; a basic combination rule, i.e. composing level by level according to combination modes, and a basic transformation rule, i.e. transforming level by level according to transformation modes, are stored in a computer storage. 2 In the process of composing level by level according to combination modes, a computer processor finds all the combination modes which can be used in the computer storage and chooses one of the combination modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use; if the computer processor finds out that there does not exist a combination mode which can be used in the computer storage, the processor performs backtracking. 3 If a combination mode contains marks used as signs of semantic relations between component segments and contains marks used as signs of semantic relations between component segments and a formed segment, combination modes and combination rules can be used in natural language understanding. The invention (1998) was a method of machine translation for translating a non-formal source language into a non-formal target language in an automatic way. An obvious limitation of the invention was that the translation could not be entirely correct. The only application of the invention was information exchange in a certain degree between people speaking respective native languages. 
     In 1999, the inventor submitted an application to the Patent Office of China for a patent on the invention “the Meaning Formalization Method of Computer-aided Translanguage Information Exchange” (application number: 99113471.0). It had the following main technical features: 1 A lexicon in which synonyms of a number of languages correspond to each other, combination marks and relation marks are stored in a computer storage; a user expresses information on a display device of a computer with words of a certain language, combination marks and relation marks, and then the computer transforms the displayed words of the language into corresponding words of another language. 2 Words of the same form and different meanings are distinguished from each other by attached words of similar meanings. 3 Key component marks (The object of the key component is identical to the object of the formed language segment). 4 A list of relation marks in which relation marks of a number of languages correspond to each other is stored in a computer storage; the computer transforms displayed relation marks of a language into corresponding relation marks of another language. 5 After a user inputs a word, a computer displays a number of words of similar meanings to be chosen by the user. 
     A knowledge representation method is a method for describing knowledge as a data structure that a computer is able to deal with. The following are common knowledge representation methods: predicate logic representation, production representation, semantic network representation, frame representation, object-oriented representation, state space representation, etc. The invention (1999) was in essence 5 a knowledge representation method. It is natural for the invention or any other knowledge representation method to contain a lexicon in which synonyms of a number of languages correspond to each other. It should be pointed out that the invention did not accord with natural languages because the lexicon of the invention was limited to 10 notional words and relation marks displaced function words (vocabulary of any natural language comprises notional words and function words). 
     SUMMARY OF THE PRESENT INVENTION 
     The present invention has been achieved in view of the aforementioned problems possessed by the prior art, and the object of the present invention is to provide a novel and improved machine translation method and system which makes a substantial breakthrough in translation quality. 
     To achieve the above object, according to a first aspect of the present invention, there is provided a method of machine translation which has the following technical features: the process of translation is first formalizing a non-formal source language and then transforming the formal source language into a target language; the method has two ways of formalizing a non-formal source language, i.e. an interactive way and an automatic way; the method has two target languages, i.e. a formal target language and a non-formal target language; the process of formalizing a non-formal source language is first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; the process of transforming a formal source language into a formal target language is transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules; the process of transforming a formal source language into a non-formal target language is first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     According to a second aspect of the present invention, there is provided a method of machine translation, wherein: the process of formalizing a non-formal source language includes a pre-processing by means of substitution marks, i.e. separating an initial language segment into a number of sub-segments by means of substitution marks in advance, and then formalizing the sub-segments respectively. 
     According to a third aspect of the present invention, there is provided a method of machine translation, wherein: a fixed language segment mode in a computer storage contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks); in the process of identifying and tagging fixed language segments in an interactive way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment and tags it with a meaning mark according to a fixed language segment mode, and after that a user confirms or revises the mark; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, a user identifies the fixed language segment beginning with the one writing unit at the forefront of the remaining language segment and tags it with a meaning mark; the process is repeated until the last fixed language segment. 
     According to a fourth aspect of the present invention, there is provided a method of machine translation, wherein: a fixed language segment mode in a computer storage contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks) and contains a grammatical attribute mark and a semantic attribute mark; in the process of identifying and tagging fixed language segments in an automatic way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment, and then finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the fixed language segment with a meaning mark, a grammatical attribute mark and a semantic attribute mark according to the fixed language segment mode; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking; the process is repeated until the last fixed language segment. 
     According to a fifth aspect of the present invention, there is provided a method of machine translation, wherein: a non-fixed language segment mode in a computer storage contains grammatical attribute marks and semantic attribute marks of the component segments and contains a combination mark, a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark of the composed segment; in the process of composing and tagging non-fixed language segments in an automatic way, a computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode; if the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the computer storage, the processor performs backtracking; the process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     According to a sixth aspect of the present invention, there is provided a method of machine translation, wherein: after a user clicks on a meaning mark, a screen displays the meaning represented by this meaning mark, and, after a user clicks on a relation mark, a screen displays the relation represented by this relation mark. 
     According to a seventh aspect of the present invention, there is provided a method of machine translation, wherein: a non-fixed language segment transformation rule is a rule which forms a non-fixed language segment of the target language with the translations of the components of the non-fixed language segment of a source language and a relation word of a target language according to the key component mark and the relation mark or relation word of the non-fixed language segment of a source language; a computer processor searches a list of non-fixed language segment transformation rules for a matching non-fixed language segment transformation rule, transforms a non-fixed language segment of the source language into a non-fixed language segment of the target language according to the matching non-fixed language segment transformation rule, repeating the step recursively until all the non-fixed language segments are transformed level by level, in which process, concerning the current non-fixed language segment of the source language, first, all the components of the current non-fixed language segment are transformed into the target language respectively, and then, the current non-fixed language segment is transformed into the target language according to the matching non-fixed language segment transformation rule, the result of the transformation of the current non-fixed language segment being returned to be used by the non-fixed language segment at the higher level, until the non-fixed language segment as the initial data is transformed into the target language. 
     According to an eighth aspect of the present invention, there is provided a system of machine translation which has the following technical features: the system comprises a module for formalizing a non-formal source language and a module for transforming a formal source language into a target language which is connected to the module for formalizing a non-formal source language before it; a module for formalizing a non-formal source language has two ways of formalizing a non-formal source language, i.e. an interactive way and an automatic way; a module for transforming a formal source language into a target language has two target languages, i.e. a formal target language and a non-formal target language; in a module for formalizing a non-formal source language, the process of formalizing a non-formal source language is first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; in a module for transforming a formal source language into a target language, the process of transforming a formal source language into a formal target language is transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules; in a module for transforming a formal source language into a target language, the process of transforming a formal source language into a non-formal target language is first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     According to a ninth aspect of the present invention, there is provided a system of machine translation, wherein: the system includes a substitution module for pre-processing by means of substitution marks which is connected to a module for formalizing a non-formal source language after it, i.e. separating an initial language segment into a number of sub-segments by means of substitution marks in advance, and then formalizing the sub-segments respectively. 
     According to a tenth aspect of the present invention, there is provided a system of machine translation, wherein: a fixed language segment mode of a module for formalizing a non-formal source language contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks); in the process of identifying and tagging fixed language segments in an interactive way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment and tags it with a meaning mark according to a fixed language segment mode, and after that a user confirms or revises the mark; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, a user identifies the fixed language segment beginning with the one writing unit at the forefront of the remaining language segment and tags it with a meaning mark; the process is repeated until the last fixed language segment. According to an eleventh aspect of the present invention, there is provided a system of machine translation, wherein: a fixed language segment mode of a module for formalizing a non-formal source language contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks) and contains a grammatical attribute mark and a semantic attribute mark; in the process of identifying and tagging fixed language segments in an automatic way, the computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment, and then finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the fixed language segment with a meaning mark, a grammatical attribute mark and a semantic attribute mark according to the fixed language segment mode; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking; the process is repeated until the last fixed language segment. According to a twelfth aspect of the present invention, there is provided a system of machine translation, wherein: a non-fixed language segment mode of a module for formalizing a non-formal source language contains grammatical attribute marks and semantic attribute marks of the component segments and contains a combination mark, a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark of the composed segment; in the process of composing and tagging non-fixed language segments in an automatic way, the computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode; if the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the computer storage, the processor performs backtracking; the process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     According to a thirteenth aspect of the present invention, there is provided a system of machine translation, wherein: after a user clicks on a meaning mark, a screen displays the meaning represented by this meaning mark, and, after a user clicks on a relation mark, a screen displays the relation represented by this relation mark. 
     According to a fourteenth aspect of the present invention, there is provided a system of machine translation, wherein: a non-fixed language segment transformation rule of a module for transforming a formal source language into a target language is a rule which forms a non-fixed language segment of the target language with the translations of the components of a non-fixed language segment of a source language and a relation word of a target language according to the key component mark and the relation mark or relation word of the non-fixed language segment of the source language; a computer processor searches a list of non-fixed language segment transformation rules for a matching non-fixed language segment transformation rule, transforms a non-fixed language segment of a source language into a non-fixed language segment of a target language according to the matching non-fixed language segment transformation rule, repeating the step recursively until all the non-fixed language segments are transformed level by level, in which process, concerning a current non-fixed language segment of a source language, first, all the components of the current non-fixed language segment are transformed into a target language respectively, and then, the current non-fixed language segment is transformed into the target language according to the matching non-fixed language segment transformation rule, the result of the transformation of the current non-fixed language segment being returned to be used by the non-fixed language segment at the higher level, until the non-fixed language segment as the initial data is transformed into a target language. 
     The present invention as a whole is the organic combination of the technical features: A non-formal source language can be formalized either in an interactive way or in an automatic way; a formal source language can be transformed in an automatic way either into a formal target language or into a non-formal target language. The present invention has technical effects unexpected according to existing technologies: A user translates his/her non-formal native language entirely correctly and without any lexical ambiguity into any non-formal foreign language which he/she knows nothing about, so the present invention completely eliminates the language barrier between person and person; a user and a computer exchange information in his/her non-formal native language entirely correctly and without any lexical ambiguity, so the present invention completely eliminates the language barrier between person and computer. In addition to being used in network terminal equipment, the present invention has applications unexpected according to existing technologies: It can be used in Internet knowledge bases, knowledge reasoning search engines, expert systems and automatic programming. The present invention represents the new direction of development of technology. (Regarding to the application of the present invention, see The application of the machine translation from a non-formal source language into a formal target language and The application of the machine translation from a non-formal source language into a non-formal target language of the PCT document.) 
     For a long time, it has been generally accepted in the artificial intelligence world that knowledge representation, natural language understanding and machine translation are three research fields independent of each other. At the time when the inventor finished “the Meaning Formalization Method of Automatic Translation” (1998) and at the time when the inventor finished “the Meaning Formalization Method of Computer-aided Translanguage Information Exchange” (1999), the inventor believed that machine translation and knowledge representation are two research fields independent of each other (“the Meaning Formalization Method of Automatic Translation” as a machine translation method while “the Meaning Formalization Method of Automatic Translation” as a knowledge representation method). Later, after long-term research, the inventor broke through the technology stereotype and, on the basis of the above two inventions, finished the present invention (2009), which is a machine translation method of an entirely new concept. A user translates his/her non-formal native language entirely correctly and without any lexical ambiguity into any non-formal foreign language which he/she knows nothing about; A non-formal source language is translated into a formal target language, which is a knowledge representation method for formally representing commonsense knowledge and professional knowledge (especially commonsense knowledge) universally and fully; the method of formalizing a non-formal source language can be used in natural language understanding technology aimed at natural language man-machine interface. So, the present invention totally solves the three major problems that the artificial intelligence world has been eager to solve for a long time: a method of machine translation which makes a substantial breakthrough in translation quality; a knowledge representation method for formally representing commonsense knowledge and professional knowledge (especially commonsense knowledge) universally and fully; a method for formalizing a non-formal natural language. 
     It should be pointed out that the vocabulary of the formal target language of the present invention (2009) comprises notional words and function words (relation words), which accords with natural languages, while the vocabulary of the invention “the Meaning Formalization Method of Computer-aided Translanguage Information Exchange” (1999) was limited to notional words (relation marks displaced function words), which did not accord with natural languages. 
     Compared with existing technologies, the present invention has the following features: 
     1 A non-formal source language can be formalized either in an interactive way or in an automatic way; a formal source language can be transformed in an automatic way either into a formal target language or into a non-formal target language. 
     2 Non-fixed language segment modes for formalizing a non-formal source language and non-fixed language segment transformation rules for transforming a formal source language into a non-formal target language are independent of each other. So, non-fixed language segment modes can be modified and added with non-fixed language segment transformation rules completely uninvolved, and non-fixed language segment transformation rules can be modified and added with non-fixed language segment modes completely uninvolved. This makes a machine translation system easily scalable. 
     3 Formalizing a non-formal source language is the common foundation for transforming it into various target languages. This makes the present invention especially suitable for multilingual machine translation. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other features of the invention and the concomitant advantages will be better understood and appreciated by persons skilled in the field to which the invention pertains in view of the following description given in conjunction with the accompanying drawings which illustrate preferred embodiments. In the drawings: 
         FIG. 1  is a block diagram showing the process of pre-processing by means of substitution marks. 
         FIG. 2  is a block diagram showing the process of identifying and tagging fixed language segments in an interactive way. 
         FIG. 3  is a block diagram showing the process of composing and tagging non-fixed language segments in an interactive way. 
         FIG. 4  is a block diagram showing the process of identifying and tagging fixed language segments in an automatic way. 
         FIG. 5  is a block diagram showing the process of composing and tagging non-fixed language segments in an automatic way. 
         FIG. 6  is a block diagram showing the process of transforming a formal source language into a formal target language in an automatic way. 
         FIG. 7  is a block diagram showing the process of transforming a formal source language into a non-formal target language in an automatic way. 
         FIG. 8  is a block diagram showing the first preferred embodiment of the system of machine translation. 
         FIG. 9  is a block diagram showing the second preferred embodiment of the system of machine translation. 
         FIG. 10  is a block diagram showing the third preferred embodiment of the system of machine translation. 
         FIG. 11  is a block diagram showing the fourth preferred embodiment of the system of machine translation. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Hereafter, the preferred embodiments will be described in reference to the accompanying drawings. 
     The First Preferred Embodiment of the Method of Machine Translation 
     This preferred embodiment is a method of machine translation for translating a non-formal source language into a formal target language, comprising the steps of: (a) formalizing a non-formal source language in an interactive way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) transforming the formal source language into a formal target language in an automatic way by transforming the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules. 
     Marks 
     (1) Fixed language segment marks: A fixed language segment mark is used as a sign of a fixed language segment. For example, a line drawn under a fixed language segment is used as a fixed language segment mark. A word, a phrase, an idiom, a saying, a person name, a place name, etc. can be regarded as a fixed language segment. A letter string (i.e. a number of letters between two spaces), a Chinese character or a Japanese kana is a writing unit (i.e. a writing segment with an Independent shape). A number of writing units constitute a fixed language segment. The fixed language segment mark of a fixed language segment constituted by one writing unit can be omitted. 
     The following are examples of fixed language segment marks: 
     The Great St. Bernard Pass is the highest mountain pass in Europe. 
     
       
       
     
     (2) Meaning marks: A meaning mark is used to make fixed language segments of the same form and different meanings to become fixed language segments of different forms and different meanings. For example, the figure at the top right of a fixed language segment is used as a meaning mark. 
     The following are examples of meaning marks: 
     research 1  research 2    
     (3) Combination marks: A combination mark is used to indicate that a number of language segments combine to form one language segment. For example: bracket-type combination marks 
       {[( {[( {[( )]} )]} )]}   
     line-type combination marks 
     
       
         
         
             
             
         
       
     
     The following are examples of bracket-type combination marks: 
     [( ) ( )] 
     The following are examples of line-type combination marks: 
     
       
         
         
             
             
         
       
     
     (4) Key component marks: A key component mark is used as a sign of a key component. For example, an asterisk on the side of a key component is used as a key component mark. 
     The following are examples of key component marks: 
     
       
         
         
             
             
         
       
     
     The object of the key component contains the object of the formed language segment or is identical to the object of the formed language segment. It is preferable to use two kinds of key component marks as signs of two kinds of key components: If the object of the key component contains the object of the formed language segment, a * on the side of the key component is used as a key component mark; If the object of the key component is identical to the object of the formed language segment, a # on the side of the key component is used as a key component mark. 
     The following are examples of two kinds of key component marks: 
     
       
         
         
             
             
         
       
     
     (5) Relation marks: A relation mark is used as a sign of a relation between components of a formed language segment. For example, a figure between components is used as a relation mark. 
     The following are examples of relation marks: 
     
       
         
         
             
             
         
       
         
         1 The object of the non-key component accepts the object of the key component. 
         2 The object of the non-key component possesses the object of the key component. 
         3 The object of the non-key component restricts the object of the key component. 
         4 The object of the non-key component is the attribute of the object of the key component. 
         5 The object of the non-key component is the manner of the object of the key component. 
         6 The object of the non-key component is the purpose of the object of the key component. 
         7 The object of the non-key component is the result of the object of the key component. 
         8 The object of the non-key component is the means of the object of the key component. 
         9 The object of the non-key component is the time of the object of the key component. 
         10 The object of the non-key component is the place of the object of the key component. 
         11 The object of the non-key component is the starting point of the object of the key component. 
         12 The object of the non-key component is the direction of the object of the key component. 
         13 The object of the non-key component is the material of the object of the key component. 
         14 The object of the non-key component is the condition of the object of the key component. 
         15 The object of the non-key component is the reason of the object of the key component. 
         16 The object of the non-key component is the frequency of the object of the key component. 
         17 The object of the non-key component is the scope of the object of the key component. 
         18 The object of the non-key component is the degree of the object of the key component. 
         19 The object of the left component is the subject of the object of the right component. 
         20 The object of the key component is the subject of the object of the non-key component. 
         21 The relation between the objects of the components is addition. 
         22 The relation between the objects of the components is choice. 
       
    
     (6) Grammatical attribute marks: A grammatical attribute mark is used as a sign of the grammatical attribute of a language segment. For example, capital Latin letters are used as grammatical attribute marks. 
     The following are examples of grammatical attribute marks based on English and used in English: 
     noun N, transitive verb VT, intransitive verb VI, link verb LV, modal verb MV, adjective A, ordinary adverb AD, interrogative adverb IAD, relative adverb RAD, nominal pronoun NP, adjectival pronoun AP, interrogative pronoun IP, relative pronoun RP, numeral NUM, article ART, preposition P, coordinating conjunction CC, subordinating conjunction SC; finite verb FV, infinitive INF, -ING participle ING, -ED participle ED; active AC, passive PA; sentence S, attributive clause ATC, adverbial clause ADC, nominal clause NC 
     The following are examples of grammatical attribute marks based on Chinese and used in Chinese: 
        (noun) M,   (transitive verb) JD,   (intransitive verb) BJD,   (link verb) LD,   (modal verb) QD,   (adjective) X,   (ordinary adverb) F,   (interrogative adverb) YF,   (nominal pronoun) MD,     (adjectival pronoun) XD,   (interrogative pronoun) YD,   (numeral) S,   (preposition) J,   (coordinating conjunction) BL,   (subordinating conjunction) CL;   (sentence) JU,   (attributive clause) DC,   (adverbial clause) ZC,   (nominal clause) MC 
     (7) Semantic attribute mark: A semantic attribute mark is used as a sign of a semantic attribute of a language segment. For example, small Latin letters are used as semantic attribute marks. 
     The following are examples of semantic attribute marks based on English and used in English: 
     human hu, living being li, object ob, substance su, thing th, time ti, place pl, unit un, concrete action ca, abstract action aa, condition co, mental activities ma, concrete character cc, abstract character ac, frequency fr, degree de, negation ne 
     The following are examples of semantic attribute marks based on Chinese and used in Chinese: 
        (human) re,   (living being) sw, (  object) wt,   (substance) wz,   (thing) ww,   (time) sj,   (place) cs,   (unit) dw,   (concrete action) jw,   (abstract action) cw,   (condition) zt,   (mental activities) xh,     (concrete character) jx,   (abstract character) cx,   (frequency) pd,   (degree) cd,   (negation) fd 
     Substitution 
     It is preferable for step (a) to include a pre-processing by means of substitution marks, i.e. separating an initial language segment into a number of sub-segments by means of substitution marks in advance, and then formalizing the sub-segments respectively. 
     A substitution mark is used as a sign of substitution. For example, circled figures are used as substitution marks.    ={circumflex over (1)} 
     The pre-processing by means of substitution marks makes it more convenient to formalize a language segment with a complex structure. 
     The following is an example of the pre-processing by means of substitution marks: 
     Step  1 : A screen displays 
     
       
       
       
     
     Step  2 : A user selects on the screen        
     Step  3 : The user presses the function key    
     Step  4 : The screen displays 
         ={circumflex over (1)} 
     
       
       
       
     
     Then the processor formalizes the sub-segments respectively. 
       FIG. 1  is a block diagram showing the computer realization of pre-processing by means of substitution marks. 
     The following is an example of the process of pre-processing by means of substitution marks. 
     Step  1 : saving the phrase input as data, “       ”, as a string type, initializing the data, and forming a node array in which each node has a corresponding text unit, wherein the placeholder list is empty; 
     Step  2 : A user selects on the screen      
     Step  3 : The user presses the function key    
     Step  4 : updating the node array, wherein the 14th node corresponds to the phrase “   ”, which has a capacity of 9 text units, wherein the symbol “{circumflex over (1)}” refers to the selected phrase, and the monitor displays the updated phrase which is processed as data. 
     Formalizing a Non-Formal Source Language in an Interactive Way 
     The first step of this preferred embodiment is formalizing a non-formal source language in an interactive way. It includes the process of identifying and tagging fixed language segments in an interactive way and the process of composing and tagging non-fixed language segments in an interactive way. 
     The Process of Identifying and Tagging Fixed Language Segments in an Interactive Way 
     The process of identifying and tagging fixed language segments in an interactive way is as follows: A fixed language segment mode in a computer storage contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks); in the process of identifying and tagging fixed language segments in an interactive way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment and tags it with a meaning mark according to a fixed language segment mode, and after that a user confirms or revises the mark; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the user identifies the fixed language segment beginning with the one writing unit at the forefront of the remaining language segment and tags it with a meaning mark; the process is repeated until the last fixed language segment. 
     The following are examples of fixed language segment modes: methods 1  data processing automatic 1    
     The following is an example of the process of identifying and tagging fixed language segments in an interactive way: 
     ABCDEFGHIJKLMNOPQRSTUVWXYZ is a language segment (A, B, C . . . X, Y, Z are writing units). 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with A, there exists in the computer storage at least one fixed language segment beginning with AB, there exists in the computer storage at least one fixed language segment beginning with ABC, and there does not exist in the computer storage at least one fixed language segment beginning with ABCD, so the computer processor identifies ABC as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags ABC with a meaning mark according to the fixed language segment mode, and after that a user confirms or revises the mark; the process is repeated until the last fixed language segment. 
     The reason why the computer processor identifies ABC as a fixed language segment is as follows: There exists in the computer storage at least one fixed language segment beginning with A, there exists in the computer storage at least one fixed language segment beginning with AB, there exists in the computer storage at least one fixed language segment beginning with ABC, and there does not exist in the computer storage at least one fixed language segment beginning with ABCD, so it is possible for the fixed language segment beginning with A to be A, AB or ABC and it is impossible for it to be ABCD or any other language segment beginning with A(ABCDE, ABCDEF . . . ). The computer processor identifies ABC, which is the longest of the three (A, AB, ABC), as a fixed language segment. 
     The computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with L, so the user identifies LMNO, which is a language segment beginning with L, as a fixed language segment, and tags it with a meaning mark; the computer processor puts into storage the new fixed language segment mode automatically. After that the next fixed language segment is identified and tagged in an interactive way. 
     The process of a user&#39;s confirming or revising a meaning mark is as follows: 
     First, a screen displays all the fixed language segment modes which can be used and their meanings. For example: 
     degree 1  [a step in a process] 
     degree 2  [a step in a direct hereditary line of descent] 
     degree 3  [relative social or official rank] 
     degree 4  [relative intensity or amount] 
     degree 5  [the extent of a state of being or an action] 
     degree 6  [a unit division of a temperature scale] 
     degree 7  [a planar unit of angular measure] 
     degree 8  [a unit of latitude or longitude] 
     degree 9  [an academic title] 
     degree 10  [a classification of a specific crime] 
     degree 11  [a classification of the severity of an injury] 
     degree 12  [a form used in the comparison of adjectives and adverbs] 
     degree 13  [a note of a diatonic scale] 
     Then, a user chooses one of the meaning marks and clicks on it. 
     The following is an English example of the process of identifying and tagging fixed language segments in an interactive way: 
     Computer science is the branch of science that is concerned with methods relating to data processing performed by automatic means. 
     A computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with computer (A fixed language segment beginning with computer is a fixed language segment the first writing unit of which is computer, e.g. computer, computer assisted instruction, computer graphics), there exists in the computer storage at least one fixed language segment beginning with computer science (A fixed language segment beginning with computer science is a fixed language segment the first and second writing units of which are computer science, e.g. computer science, computer science and technology, computer science department), and there does not exist in the computer storage at least one fixed language segment beginning with computer science is (A fixed language segment beginning with computer science is a fixed language segment the first, second and third writing units of which are computer science is), so the computer processor identifies computer science as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags computer science with a meaning mark according to the fixed language segment mode, and after that a user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with is and there does not exist in the computer storage at least one fixed language segment beginning with is the, so the computer processor identifies is as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags is with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with the and there does not exist in the computer storage at least one fixed language segment beginning with the branch, so the computer processor identifies the as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with branch and there does not exist in the computer storage at least one fixed language segment beginning with branch of, so the computer processor identifies branch as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags branch with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with of and there does not exist in the computer storage at least one fixed language segment beginning with of science, so the computer processor identifies of as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags of with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with science and there does not exist in the computer storage at least one fixed language segment beginning with science that, so the computer processor identifies science as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags science with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     Computer science is 1  the branch 3  of science 1  . . . 
     . . . 
     The reason why the computer processor identifies computer science as a fixed language segment is as follows: There exists in the computer storage at least one fixed language segment beginning with computer, there exists in the computer storage at least one fixed language segment beginning with computer science, and there does not exist in the computer storage at least one fixed language segment beginning with computer science is, so it is possible for the fixed language segment beginning with computer to be computer or computer science and it is impossible for it to be computer science is or any other language segment beginning with computer (computer science is the, computer science is the branch, computer science is the branch of . . . ). The computer processor identifies computer science, which is the longer of the two (computer, computer science), as a fixed language segment. 
     The following is a Chinese example of the process of identifying and tagging fixed language segments in an interactive way: 
       FIG. 2  is a block diagram showing the process of identifying and tagging fixed language segments in an interactive way, wherein heavy lines indicate no existence of the set phrases, thin line arrows indicate the existence of the set phrases, and dashed arrows indicate no existence of the set phrase which starts this way. 
             . 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with   (A fixed language segment beginning with   is a fixed language segment the first writing unit of which is  , e.g.  ,  ,  ,  ,  ), there exists in the computer storage at least one fixed language segment beginning with   A fixed language segment beginning with   is a fixed language segment the first and second writing units of which are    , e.g.  ,  ,  ), there exists in the computer storage at least one fixed language segment beginning with   (A fixed language segment beginning with   is a fixed language segment the first, second and third writing units of which are  , e.g.  ,  ,  ), there exists in the computer storage at least one fixed language segment beginning with   (A fixed language segment beginning with   is a fixed language segment the first, second, third and fourth writing units of which are  , e.g.  ,    ,  ), there exists in the computer storage at least one fixed language segment beginning with   (A fixed language segment beginning with   is a fixed language segment the first, second, third, fourth and fifth writing units of which are  , e.g.  ,  ,  ), and there does not exist in the computer storage at least one fixed language segment beginning with   (A fixed language segment beginning with   is a fixed language segment the first, second, third, fourth, fifth and sixth writing units of which are  ), so the computer processor identifies   as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags   with a meaning mark according to the fixed language segment mode, and after that a user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with   and there does not exist in the computer storage at least one fixed language segment beginning with  , so the computer processor identifies   as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags   with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , and there does not exist in the computer storage at least one fixed language segment beginning with    , so the computer processor identifies   as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags   with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with  , and there does not exist in the computer storage at least one fixed language segment beginning with  , so the computer processor identifies   as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags   with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
     The computer processor finds out in turn that there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , and there does not exist in the computer storage at least one fixed language segment beginning with  , so the computer processor identifies   as a fixed language segment, finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags   with a meaning mark according to the fixed language segment mode, and after that the user confirms the meaning mark. 
          . . . 
     . . . 
     The reason why the computer processor identifies   as a fixed language segment is as follows: There exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , there exists in the computer storage at least one fixed language segment beginning with  , and there does not exist in the computer storage at least one fixed language segment beginning with  , so it is possible for the fixed language segment beginning with   to be  ,  ,  ,   or   and it is impossible for it to be     or any other language segment beginning with   ( ,    ,    , . . . ). The computer processor identifies   which is the longest of the five ( ,  ,  ,  ,  ), as a fixed language segment. 
     The Process of Composing and Tagging Non-Fixed Language Segments in an Interactive Way 
     The process of composing and tagging non-fixed language segments in an interactive way is as follows: A computer processor and a user compose level by level non-fixed language segments of an initial language segment and tag one by one the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     The following is an example of the process of composing and tagging non-fixed language segments in an interactive way: 
     Step  1 : A screen displays 
     Please compose a non-fixed language segment. 
     Step  2 : A user clicks on the first and the last writing units of the first non-fixed language segment at the first level. 
     Step  3 : The screen displays a combination mark of the first non-fixed language segment at the first level. 
     Step  4 : The screen displays 
     Please tag it with a key component mark 
     Step  5 : The user clicks on the position of the key component mark. 
     Step  6 : The screen displays the key component mark. 
     Step  7 : The screen displays 
     Please choose a relation mark
     1 The object of the non-key component accepts the object of the key component.   2 The object of the non-key component possesses the object of the key component.   3 The object of the non-key component restricts the object of the key component.   4 The object of the non-key component is the attribute of the object of the key component.   5 The object of the non-key component is the manner of the object of the key component.   6 The object of the non-key component is the purpose of the object of the key component.   7 The object of the non-key component is the result of the object of the key component.   8 The object of the non-key component is the means of the object of the key component.   9 The object of the non-key component is the time of the object of the key component.   10 The object of the non-key component is the place of the object of the key component.   11 The object of the non-key component is the starting point of the object of the key component.   12 The object of the non-key component is the direction of the object of the key component.   13 The object of the non-key component is the material of the object of the key component.   14 The object of the non-key component is the condition of the object of the key component.   15 The object of the non-key component is the reason of the object of the key component.   16 The object of the non-key component is the frequency of the object of the key component.   17 The object of the non-key component is the scope of the object of the key component.   18 The object of the non-key component is the degree of the object of the key component.   19 The object of the left component is the subject of the object of the right component.   20 The object of the key component is the subject of the object of the non-key component.   21 The relation between the objects of the components is addition.   22 The relation between the objects of the components is choice.   

     Step  8 : The user clicks on the relation mark he chooses. 
     Step  9 : The screen displays the relation mark. 
     Step  10 : The screen displays 
     Please compose a non-fixed language segment. 
     Step  11 : The user clicks on the first and the last writing units of the second non-fixed language segment at the first level. 
     . . . 
     The following is an English example: 
     An initial language segment 
     
       
         
         
             
             
         
       
     
     A non-fixed language segment at the first level 
     
       
         
         
             
             
         
       
     
     A non-fixed language segment at the second level 
     
       
         
         
             
             
         
       
     
     A non-fixed language segment at the third level 
     
       
         
         
             
             
         
       
     
     A non-fixed language segment at the fourth level 
     
       
         
         
             
             
         
       
     
     The Computer Realization of Composing and Tagging Non-Fixed Language Segments in an Interactive Way 
       FIG. 3  is a block diagram showing the process of composing and tagging non-fixed language segments in an interactive way. 
     Step  1 : A screen displays an initial language segment and displays 
     Please compose a non-fixed language segment. 
     Step  2 : accepting the two clicks by the user, obtaining the first character and the last character of the non-set phrase, marking the string, which is started with the first character and ended with the last character, with the horizontal line type combination mark, and prompting “Please make the core component mark”; 
     Step  3 : if the user clicks the position of core component mark, making the core component mark by the processor, and if the user clicks the core component mark, deleting the core component mark; 
     Step  4 : right clicking the horizontal line type combination mark of the non-set phrase with the mouse by the user, wherein the processor popups a right click menu containing the two options “Relationship tag list” and “Cancel non-set phrase”, if the user clicks a relationship mark in the right click menu, making the relationship mark by the processor, and if the user selects “Cancel non-set phrase”, deleting the horizontal line type combination mark of the non-set phrase; 
     Step  5 : repeating Step  2  to Step  4  until obtaining a non-set phrase constituted by the whole initial phrase; 
     Step  6 : forming a node list. 
     Transforming a Formal Source Language into a Formal Target Language in an Automatic Way 
     The second step of this preferred embodiment is transforming in an automatic way fixed language segments of a source language into language segments of a target language according to fixed language segment transformation rules. 
     The following are examples of the process of transforming a formal source language into a formal target language in an automatic way: 
     Non-formal English 
     methods relating to data processing performed by automatic means 
     Formal English 
     
       
         
         
             
             
         
       
     
     (This is a result of formalizing a non-formal source language in an interactive way.) 
     A formal source language as a result of formalizing a non-formal source language in an automatic way bears grammatical attribute marks and semantic attribute marks. For example: 
     
       
         
         
             
             
         
       
     
     (This is a result of formalizing a non-formal source language in an automatic way.) 
     First, a computer processor deletes the grammatical attribute marks and semantic attribute marks in an automatic way. For example: 
     
       
         
         
             
             
         
       
     
     It is likewise feasible to keep the grammatical attribute marks and semantic attribute marks. 
     Then, the computer processor transforms in an automatic way the fixed language segments of the source language (English) into language segments of the target language (Chinese) according to fixed language segment transformation rules. Fixed language segment transformation rules 
     
       
         
           
               
               
               
               
               
               
             
               
                   
                   
               
               
                   
                 
                   
                 
                 
                   
                 
                 
                   
                 
                 
                   
                 
                 
                   
                 
               
               
                   
                   
               
             
            
               
                   
                 methods 1   
                 
                   
                 
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                 relating to 
                      1   
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                 data processing 
                 
                   
                 
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                 performed 1   
                 
                   
                 
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                 by 2   
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                 automatic 1   
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                 means 1   
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     After a user clicks on a meaning mark, a screen displays the meaning represented by this meaning mark. For example: After a user clicks on  3  in    3 , a screen displays:    3  [     ]. After a user clicks on a relation mark, a screen displays the relation represented by this relation mark. For example: After a user clicks on 4, a screen displays: 4        . 
     Non-Formal Chinese 
     
       
       
       
     
     Formal Chinese 
     
       
         
         
             
             
         
       
     
     
       
       
       
     
     
       
       
       
       
     
     The computer processor transforms in an automatic way the fixed language segments of the source language (Chinese) into language segments of the target language (English) according to fixed language segment transformation rules. 
     Formal English 
     
       
         
         
             
             
         
       
     
     involve 2  [contain as a part] 
     and 1  [The relation between the objects of the components is addition.] 
     of 14  [The object of the non-key component executes the object of the key component.] 
     The Computer Realization of Transforming a Formal Source Language into a Formal Target Language in an Automatic Way 
       FIG. 6  is a block diagram showing the process of transforming a formal source language into a formal target language in an automatic way. 
     Step  1 : If a formal source language contains grammatical attribute marks and semantic attribute marks, a computer processor deletes the grammatical attribute marks and semantic attribute marks. 
     Step  2 : The computer processor searches a list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of a source language into fixed or non-fixed language segments of a target language according to the matching fixed language segment transformation rules, fixed language segments of the target language bearing meaning marks. 
     Step  3 : After a user clicks on a meaning mark, a screen displays the meaning represented by this meaning mark, and, after a user clicks on a relation mark, a screen displays the relation represented by this relation mark. 
     The Second Preferred Embodiment of the Method of Machine Translation 
     This preferred embodiment is a method of machine translation for translating a non-formal source language into a formal target language, comprising the steps of: (a) formalizing a non-formal source language in an automatic way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) transforming the formal source language into a formal target language in an automatic way by transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules. 
     Marks (See the first preferred embodiment of the method of machine translation.) 
     Substitution (See the first preferred embodiment of the method of machine translation.) 
     Formalizing a Non-Formal Source Language in an Automatic Way 
     The first step of this preferred embodiment is formalizing a non-formal source language in an automatic way. It includes the process of identifying and tagging fixed language segments in an automatic way and the process of composing and tagging non-fixed language segments in an automatic way. 
     The Process of Identifying and Tagging Fixed Language Segments in an Automatic Way 
     The process of identifying and tagging fixed language segments in an automatic way is as follows: A fixed language segment mode in a computer storage contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks) and contains a grammatical attribute mark and a semantic attribute mark; in the process of identifying and tagging fixed language segments in an automatic way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the rewriting unit(s) at the forefront as a fixed language segment, and then finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the fixed language segment with a meaning mark, a grammatical attribute mark and a semantic attribute mark according to the fixed language segment mode; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking; the process is repeated until the last fixed language segment. 
     The computer processor corrects by backtracking the mistakes made in the process of identifying and tagging fixed language segments in an automatic way. 
     The following are examples of fixed language segment modes: 
     
       
         
         
             
             
         
       
     
     The following are examples of identifying and tagging fixed language segments in an automatic way: 
     English 
     
       
         
         
             
             
         
       
     
     Chinese 
     
       
         
         
             
             
         
       
     
     The Computer Realization of Identifying and Tagging Fixed Language Segments in an Automatic Way 
       FIG. 4  is a block diagram showing the process of identifying and tagging fixed language segments in an automatic way, wherein thin lines indicate the existence of the set phrases, heavy lines indicate no existence of the set phrases, and dashed lines indicate no existence of the set phrase which starts this way, as referring to  FIG. 4 . 
     Step  1 : A processor obtains an initial language segment        . 
     Step  2 : The processor searches for at least one fixed language segment the first writing unit of which is  . →YES (There exists in the computer storage at least one fixed language segment beginning with  )→Among the fixed language segments the first writing unit of which is  , the processor searches for at least one fixed language segment the second writing unit of which is  . →YES (There exists in the computer storage at least one fixed language segment beginning with  )→Among the fixed language segments the first writing unit of which is   and the second writing unit of which is  , the processor searches for at least one fixed language segment the third writing unit of which is  . →YES (There exists in the computer storage at least one fixed language segment beginning with  )→Among the fixed language segments the first writing unit of which is  , the second writing unit of which is   and the third writing unit of which is  , the processor searches for at least one fixed language segment the fourth writing unit of which is  . →YES (There exists in the computer storage at least one fixed language segment beginning with  )→Among the fixed language segments the first writing unit of which is  , the second writing unit of which is  , the third writing unit of which is   and the fourth writing unit of which is  , the processor searches for at least one fixed language segment the fifth writing unit of which is  . →YES (There exists in the computer storage at least one fixed language segment beginning with  .) →Among the fixed language segments the first writing unit of which is  , the second writing unit of which is  , the third writing unit of which is  , the fourth writing unit of which is   and the fifth writing unit of which is  , the processor searches for at least one fixed language segment the sixth writing unit of which is  . →NO (There does not exist in the computer storage at least one fixed language segment beginning with  )→The computer processor identifies   as a fixed language segment. 
     Step  3 : The processor finds out the mark group (meaning mark, grammatical attribute mark, semantic attribute mark) list of the set phrase “ ”, and marks the set phrase “ ” with the mark group with the highest accumulative use times. 
     Step  4 : The processor saves the set phrase and the mark group thereof (meaning mark, grammatical attribute mark, semantic attribute mark) in a node in the data list. If the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking. 
     The process is repeated until the last fixed language segment. 
     The Process of Composing and Tagging Non-Fixed Language Segments in an Automatic Way 
     The process of composing and tagging non-fixed language segments in an automatic way is as follows: A non-fixed language segment mode in a computer storage contains grammatical attribute marks and semantic attribute marks of the component segments and contains a combination mark, a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark of the composed segment; in the process of composing and tagging non-fixed language segments in an automatic way, the computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode; if the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the computer storage, the processor performs backtracking; the process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     By the backtracking in the process of composing and tagging non-fixed language segments in an automatic way, the computer processor corrects the mistakes made in the process of composing and tagging non-fixed language segments in an automatic way and the mistakes made in the process of identifying and tagging fixed language segments in an automatic way. 
     Some of the mistakes made in the process of identifying and tagging fixed language segments in an automatic way can be corrected only by the backtracking in the process of composing and tagging non-fixed language segments in an automatic way. The following are examples of non-fixed language segment mode: 
     
       
         
         
             
             
         
       
     
     The following is an example of composing and tagging non-fixed language segments in an automatic way: 
     An Initial Language Segment 
     
       
         
         
             
             
         
       
     
     A Non-Fixed Language Segment at the First Level 
     
       
         
         
             
             
         
       
     
     A Non-Fixed Language Segment at the Second Level 
     
       
         
         
             
             
         
       
     
     A Non-Fixed Language Segment at the Third Level 
     
       
         
         
             
             
         
       
     
     A Non-Fixed Language Segment at the Fourth Level 
     
       
         
         
             
             
         
       
     
     The Computer Realization of Composing and Tagging Non-Fixed Language Segments in an Automatic Way 
       FIG. 5  is a block diagram showing the process of composing and tagging non-fixed language segments in an automatic way. 
     Step  1 : A computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode. 
     Step  2 : The computer processor saves the non-set phrase and the mark group thereof (core composition mark, relationship mark, grammatical attribute mark, semantic attribute mark) in a node in the data list and saves the quote of the composition phrase (Child node) and the quote of the combination phrase (Father node). 
     If the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the list of non-fixed language segment modes, the processor performs backtracking. 
     The process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     The second step of this preferred embodiment is exactly the same as the second step of the first preferred embodiment. 
     The Application of the Machine Translation from a Non-Formal Source Language into a Formal Target Language 
     1 The machine translation from a non-formal source language into a formal target language can be used in network terminal equipment. For example: A machine translation system from a non-formal source language into a formal target language for mobile phones. A is a user whose native language is Chinese and who knows nothing about English; Bis a user whose native language is English and who knows nothing about Chinese. A puts non-formal Chinese into his/her mobile phone; A and his/her mobile phone formalize non-formal Chinese in an interactive way; his/her mobile phone transforms formal Chinese into formal English in an automatic way; his/her mobile phone sends formal English to B; B reads formal English on his/her mobile phone. B puts non-formal English into his/her mobile phone; Band his/her mobile phone formalize non-formal English in an interactive way; his/her mobile phone transforms formal English into formal Chinese in an automatic way; his/her mobile phone sends formal Chinese to A; A reads formal Chinese on his/her mobile phone. Users speaking different native languages can take part in absolutely accurate (no ambiguity) information exchange over the Internet in their respective native languages. The machine translation from a non-formal source language into a formal target language can not only eliminate the Internet language barriers but also promote the development of all kinds of languages. 
     2 The machine translation from a non-formal source language into a formal target language can be used in Internet knowledge bases and knowledge reasoning search engines. For example: In an Internet knowledge base, common knowledge and professional knowledge are represented comprehensively and fully in formal English. Abstracts of papers in non-formal English published on the Internet are formalized in an interactive way by authors and a knowledge reasoning search engine. Abstracts of papers in non-formal Chinese, Japanese, French, German, Russian, etc. published on the Internet are formalized in an interactive way by authors and a knowledge reasoning search engine and then formal Chinese, Japanese, French, German, Russian, etc. are transformed into formal English in an automatic way by the knowledge reasoning search engine. Abstracts of papers in formal English are stored in the Internet knowledge base. After a user puts forward a special subject, the knowledge reasoning search engine finds knowledge about the special subject in the Internet knowledge base and then extend, expand and restructure knowledge through reasoning, and output the results of the reasoning in formal English, enlightening the user so that he/she can make new discoveries and inventions. A knowledge reasoning search engine can transform results of reasoning in formal English into that in formal Chinese/Japanese/French/German/Russian, etc. in an automatic way according to the need of a user. A knowledge reasoning search engine can greatly speed up the development of science and technology. Humanity is at the primary stage of the information age characterized by Internet and search engines; Humanity will enter the higher stage of the information age characterized by Internet knowledge bases and knowledge reasoning search engines. 
     3 The machine translation from a non-formal source language into a formal target language can be used in expert systems. For example: In the knowledge base of an expert system, common knowledge and professional knowledge are represented comprehensively and fully in formal English. An expert whose native language is Chinese/Japanese/French/German/Russian puts knowledge into an expert system in non-formal Chinese/Japanese/French/German/Russian; The expert and the expert system formalize non-formal Chinese/Japanese/French/German/Russian in an interactive way; The expert system transforms formal Chinese/Japanese/French/German/Russian into formal English in an automatic way; The expert system puts knowledge represented in formal English into its knowledge base. A user whose native language is Chinese/Japanese/French/German/Russian puts a question in non-formal Chinese/Japanese/French/German/Russian into the expert system; The user and the expert system formalize non-formal Chinese/Japanese/French/German/Russian in an interactive way; The expert system transforms formal Chinese/Japanese/French/German/Russian into formal English in an automatic way; The expert system makes knowledge reasoning and outputs an answer in formal English. The expert system can transform an answer in formal English into that in formal Chinese/Japanese/French/German/Russian in an automatic way according to the need of a user. 
     4 The machine translation from a non-formal source language into a formal target language can be used in automatic programming. For example: A user whose native language is Chinese/Japanese/French/German/Russian puts a program designed in non-formal Chinese/Japanese/French/German/Russian into a computer; The user and the computer formalize non-formal Chinese/Japanese/French/German/Russian in an interactive way; The computer transforms formal Chinese/Japanese/French/German/Russian into formal English in an automatic way; The computer transforms formal English into a programming language in an automatic way. 
     The Third Preferred Embodiment of the Method of Machine Translation 
     This preferred embodiment is a method of machine translation for translating a non-formal source language into a non-formal target language, comprising the steps of: (a) formalizing a non-formal source language in an interactive way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) transforming the formal source language into a non-formal target language in an automatic way by first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     Marks (See the first preferred embodiment of the method of machine translation.) 
     Substitution (See the first preferred embodiment of the method of machine translation.) 
     The first step of this preferred embodiment is exactly the same as the first step of the first preferred embodiment. 
     The process of transforming a formal source language into a non-formal target language in an automatic way 
     The process of transforming a formal source language into a non-formal target language in an automatic way is as follows: A computer processor first transforms in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules, and then transforms level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. (A non-fixed language segment transformation rule is a rule which forms a non-fixed language segment of the target language with the translations of the components of the non-fixed language segment of a source language and a relation word of a target language according to the key component mark and the relation mark or relation word of the non-fixed language segment of a source language.) 
     The following is an example of the process of transforming a formal source language into a non-formal target language in an automatic way: 
     Non-Formal English 
     methods relating to data processing performed by automatic means 
     Formalizing the non-formal source language (English) in an interactive way: 
     Formal English 
     
       
         
         
             
             
         
       
     
     Transforming in an automatic way the fixed language segments of the source language (English) into language segments of the target language (Chinese) according to fixed language segment transformation rules: 
     Fixed Language Segment Transformation Rules 
     
       
         
           
               
               
               
               
               
             
               
                   
               
               
                 ENGLISH 
                 CHINESE 
                 FRENCH 
                 GERMAN 
                 JAPANESE 
               
               
                   
               
             
            
               
                 methods 1   
                 
                   
                 
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                 relating to 
                      1   
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                 data processing 
                 
                   
                 
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                 performed 1   
                 
                   
                 
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                 by 2   
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                 automatic 1   
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                 means 1   
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     methods 1 →  data processing→  performed 1 →  automatic 1 →   3  means 1 →   1    
     Transforming level by level in an automatic way the non-fixed language segments of the source language (English) into language segments of the target language (Chinese) according to non-fixed language segment transformation rules: 
     Non-Fixed Language Segment Transformation Rules 
     ( . . . , . . . are used as signs of English components; by 2 , relating to are English relation words; * is a key component mark; 4, 1 are relation marks; →is used as a sign of transformation;  ,   are used as signs of Chinese translations of English components;  ,    5 ,    1  are Chinese relation words.) 
     Rule I . . . 4 . . . *→   
     Rule II * . . . by 2  . . . →   5     
     Rule III * . . . 1 . . . →   
     Rule IV * . . . relating to . . . →   1     
     Transformation at the First Level
 
automatic 1  means 1 →   →   3     1   (Rule I)
 
     Transformation at the Second Level
 
performed 1  by 2  automatic 1  means 1 →   5  automatic 1      →   5     3     1     (Rule II)
 
     Transformation at the Third Level
 
data processing performed 1  by 2  automatic 1  means 1 →performed 1  by 2  automatic 1      →   5     3     1     (Rule III)
 
     Transformation at the Fourth Level
 
methods 1  relating to data processing performed 1  by 2  automatic 1  means 1 →   1  data processing performed 1  by 2  automatic 1      →   1     5       3     1       (Rule IV)
 
     Non-Formal Chinese 
     
       
       1 
       
       5 
       
       3 
       
       1 
       
       
     
     The Computer Realization of Transforming a Formal Source Language into a Non-Formal Target Language in an Automatic Way 
       FIG. 7  is a block diagram showing the process of transforming a formal source language into a non-formal target language in an automatic way. 
     Step  1 : A computer processor searches a list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of the source language into fixed or non-fixed language segments of the target language according to the matching fixed language segment transformation rules. 
     Step  2 : The computer processor searches a list of non-fixed language segment transformation rules for a matching non-fixed language segment transformation rule, transforms a non-fixed language segment of the source language into a non-fixed language segment of the target language according to the matching non-fixed language segment transformation rule, repeating the step recursively until all the non-fixed language segments are transformed level by level, in which process, concerning the current non-fixed language segment of the source language, first, all the components of the current non-fixed language segment are transformed into the target language respectively, and then, the current non-fixed language segment is transformed into the target language according to the matching non-fixed language segment transformation rule, the result of the transformation of the current non-fixed language segment being returned to be used by the non-fixed language segment at the higher level, until the non-fixed language segment as the initial data is transformed into the target language. 
     Step  3 : The computer outputs the non-formal target language. 
     The fourth preferred embodiment of the method of machine translation 
     This preferred embodiment is a method of machine translation for translating a non-formal source language into a non-formal target language, comprising the steps of: (a) formalizing a non-formal source language in an automatic way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) transforming the formal source language into a non-formal target language in an automatic way by first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     Marks (See the first preferred embodiment of the method of machine translation.) 
     Substitution (See the first preferred embodiment of the method of machine translation.) 
     The first step of this preferred embodiment is exactly the same as the first step of the second preferred embodiment. 
     The second step of this preferred embodiment is exactly the same as the second step of the third preferred embodiment. 
     The Application of the Machine Translation from a Non-Formal Source Language into a Non-Formal Target Language 
     The machine translation from a non-formal source language into a non-formal target language can be used in network terminal equipment. For example: A machine translation system from a non-formal source language into a non-formal target language for mobile phones. A is a user whose native language is Chinese and who knows nothing about English; B is a user whose native language is English and who knows nothing about Chinese. A puts non-formal Chinese into his/her mobile phone; A and his/her mobile phone formalize non-formal Chinese in an interactive way; his/her mobile phone transforms formal Chinese into non-formal English in an automatic way; his/her mobile phone sends non-formal English to B; B reads non-formal English on his/her mobile phone. B puts non-formal English into his/her mobile phone; B and his/her mobile phone formalize non-formal English in an interactive way; his/her mobile phone transforms formal English into non-formal Chinese in an automatic way; his/her mobile phone sends non-formal Chinese to A; A reads non-formal Chinese on his/her mobile phone. A user can translate his/her native language correctly and without any lexical ambiguity into any foreign language which he/she knows nothing about. Users speaking different native languages can take part in accurate information exchange over the Internet in their respective native languages. 
     The First Preferred Embodiment of the System of Machine Translation 
       FIG. 8  is a block diagram showing the first preferred embodiment of the system of machine translation. 
     This preferred embodiment is a system of machine translation for translating a non-formal source language into a formal target language, comprising: (a) source language formalization module  10  for formalizing a non-formal source language in an interactive way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) target language transformation module  12  connected to source language formalization module  10  before it for transforming the formal source language into a formal target language in an automatic way by transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules. 
     It is preferable for the system to include a substitution module connected to source language formalization module  10  after it for pre-processing by means of substitution marks before formalizing a non-formal source language in an interactive way, i.e. separating an initial language segment into a number of sub-segments by means of substitution marks in advance, and then formalizing the sub-segments respectively. Source language formalization module  10  for formalizing a non-formal source language in an interactive way includes unit  100  for identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and unit  102  connected to unit  100  before it for composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     The following is how unit  100  identifies and tags fixed language segments: A fixed language segment mode of a source language formalization module contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks); in the process of identifying and tagging fixed language segments in an interactive way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment and tags it with a meaning mark according to a fixed language segment mode, and after that a user confirms or revises the mark; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the user identifies the fixed language segment beginning with the one writing unit at the forefront of the remaining language segment and tags it with a meaning mark; the process is repeated until the last fixed language segment. 
     The following is how unit  102  composes and tags non-fixed language segments: In an interactive way, the computer processor and the user compose level by level the non-fixed language segments of the initial language segment and tag the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     Target language transformation module  12  for transforming a formal source language into a formal target language in an automatic way includes unit  122  which searches a list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of the source language into fixed or non-fixed language segments of the target language according to the matching fixed language segment transformation rules and unit  124  which displays the meaning represented by a meaning mark of a fixed language segment of the target language after a user clicks on the meaning mark and displays the relation represented by a relation mark after a user clicks on the relation mark. 
     The Second Preferred Embodiment of the System of Machine Translation 
       FIG. 9  is a block diagram showing the second preferred embodiment of the system of machine translation. 
     This preferred embodiment is a system of machine translation for translating a non-formal source language into a formal target language, comprising: (a) source language formalization module  20  for formalizing a non-formal source language in an automatic way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) target language transformation module  22  connected to source language formalization module  20  before it for transforming the formal source language into a formal target language in an automatic way by transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules. 
     Source language formalization module  20  for formalizing a non-formal source language in an automatic way includes unit  200  for identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and unit  202  connected to unit  200  before it for composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     The following is how unit  200  identifies and tags fixed language segments: A fixed language segment mode in a computer storage contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks) and contains a grammatical attribute mark and a semantic attribute mark; in the process of identifying and tagging fixed language segments in an automatic way, a computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment, and then finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the fixed language segment with a meaning mark, a grammatical attribute mark and a semantic attribute mark according to the fixed language segment mode; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking; the process is repeated until the last fixed language segment. The following is how unit  202  composes and tags non-fixed language segments: A non-fixed language segment mode in a computer storage contains grammatical attribute marks and semantic attribute marks of the component segments and contains a combination mark, a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark of the composed segment; in the process of composing and tagging non-fixed language segments in an automatic way, the computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode; if the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the computer storage, the processor performs backtracking; the process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     Target language transformation module  22  for transforming the formal source language into a formal target language in an automatic way includes unit  222  which searches a list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of the source language into fixed or non-fixed language segments of the target language according to the matching fixed language segment transformation rules and unit  224  which displays the meaning represented by a meaning mark of a fixed language segment of the target language after the user clicks on the meaning mark and displays the relation represented by a relation mark after the user clicks on the relation mark. 
     The Third Preferred Embodiment of the System of Machine Translation 
       FIG. 10  is a block diagram showing the third preferred embodiment of the system of machine translation. 
     This preferred embodiment is a system of machine translation for translating a non-formal source language into a non-formal target language, comprising: (a) source language formalization module  30  for formalizing a non-formal source language in an interactive way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) target language transformation module  32  connected to source language formalization module  30  before it for transforming the formal source language into a non-formal target language in an automatic way by first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     It is preferable for the system to include a substitution module connected to source language formalization module  30  after it for pre-processing by means of substitution marks before formalizing a non-formal source language in an interactive way, i.e. separating an initial language segment into a number of sub-segments by means of substitution marks in advance, and then formalizing the sub-segments respectively. Source language formalization module  30  for formalizing a non-formal source language in an interactive way includes unit  300  for identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and unit  302  connected to unit  300  before it for composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     The following is how unit  300  identifies and tags fixed language segments: A fixed language segment mode of a source language formalization module contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks); in the process of identifying and tagging fixed language segments in an interactive way, the computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment and tags it with a meaning mark according to a fixed language segment mode, and after that the user confirms or revises the mark; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the user identifies the fixed language segment beginning with the one writing unit at the forefront of the remaining language segment and tags it with a meaning mark; the process is repeated until the last fixed language segment. 
     The following is how unit  302  composes and tags non-fixed language segments: In an interactive way, the computer processor and the user compose level by level the non-fixed language segments of the initial language segment and tag the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     Target language transformation module  32  for transforming the formal source language into a non-formal target language in an automatic way includes unit  320  which searches the list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of the source language into fixed or non-fixed language segments of the target language according to the matching fixed language segment transformation rules and unit  322  connected to unit  320  before it which searches the list of non-fixed language segment transformation rules for a matching non-fixed language segment transformation rule, transforms a non-fixed language segment of the source language into a non-fixed language segment of the target language according to the matching non-fixed language segment transformation rule, repeating the step recursively until all the non-fixed language segments are transformed level by level, in which process, concerning the current non-fixed language segment of the source language, first, all the components of the current non-fixed language segment are transformed into the target language respectively, and then, the current non-fixed language segment is transformed into the target language according to the matching non-fixed language segment transformation rule, the result of the transformation of the current non-fixed language segment being returned to be used by the non-fixed language segment at the higher level, until the non-fixed language segment as the initial data is transformed into the target language. 
     The Fourth Preferred Embodiment of the System of Machine Translation 
       FIG. 11  is a block diagram showing the fourth preferred embodiment of the system of machine translation. 
     This preferred embodiment is a system of machine translation for translating a non-formal source language into a non-formal target language, comprising: (a) source language formalization module  40  for formalizing a non-formal source language in an automatic way by first identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and then composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment; (b) target language transformation module  42  connected to source language formalization module  40  before it for transforming the formal source language into a non-formal target language in an automatic way by first transforming in an automatic way the fixed language segments of the source language into language segments of the target language according to fixed language segment transformation rules and then transforming level by level in an automatic way the non-fixed language segments of the source language into language segments of the target language according to non-fixed language segment transformation rules. 
     Source language formalization module  40  for formalizing a non-formal source language in an automatic way includes unit  400  for identifying one by one the fixed language segments of an initial language segment of a non-formal source language and tagging the fixed language segments with meaning marks until the last fixed language segment and unit  402  connected to unit  400  before it for composing level by level the non-fixed language segments of the initial language segment and tagging the non-fixed language segments with key component marks and relation marks until the non-fixed language segment constituted by the whole initial language segment. 
     The following is how unit  400  identifies and tags fixed language segments: A fixed language segment mode of a source language formalization module contains a fixed language segment and its meaning mark (fixed language segments of the same form and different meanings bearing meaning marks) and contains a grammatical attribute mark and a semantic attribute mark; in the process of identifying and tagging fixed language segments in an automatic way, the computer processor judges in turn whether there exists in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the two writing units at the forefront, whether there exists in the computer storage at least one fixed language segment beginning with the three writing units at the forefront, and so on; if there exists in the computer storage at least one fixed language segment beginning with the n (a natural number, and the same below) writing unit(s) at the forefront and there does not exist in the computer storage at least one fixed language segment beginning with the n+1 writing units at the forefront, the computer processor identifies the n writing unit(s) at the forefront as a fixed language segment, and then finds all the fixed language segment modes which can be used in the computer storage, chooses one of the fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, and tags the fixed language segment with a meaning mark, a grammatical attribute mark and a semantic attribute mark according to the fixed language segment mode; if the computer processor finds out that there does not exist in the computer storage at least one fixed language segment beginning with the one writing unit at the forefront of the remaining language segment, the processor performs backtracking; the process is repeated until the last fixed language segment. 
     The following is how unit  402  composes and tags non-fixed language segments: A non-fixed language segment mode of a source language formalization module contains grammatical attribute marks and semantic attribute marks of the component segments and contains a combination mark, a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark of the composed segment; in the process of composing and tagging non-fixed language segments in an automatic way, the computer processor finds all the non-fixed language segment modes which can be used in the computer storage, chooses one of the non-fixed language segment modes in the choice order that a mode with a larger total number of use is prior to a mode with a smaller total number of use, composes a non-fixed language segment and tags it with a key component mark, a relation mark, a grammatical attribute mark and a semantic attribute mark according to the non-fixed language segment mode; if the computer processor finds out that there does not exist a non-fixed language segment mode which can be used in the computer storage, the processor performs backtracking; the process is repeated until the non-fixed language segment constituted by the whole initial language segment. 
     Target language transformation module  42  for transforming the formal source language into a non-formal target language in an automatic way includes unit  420  which searches the list of fixed language segment transformation rules for matching fixed language segment transformation rules and transforms fixed language segments of the source language into fixed or non-fixed language segments of the target language according to the matching fixed language segment transformation rules and unit  422  connected to unit  420  before it which searches the list of non-fixed language segment transformation rules for a matching non-fixed language segment transformation rule, transforms a non-fixed language segment of the source language into a non-fixed language segment of the target language according to the matching non-fixed language segment transformation rule, repeating the step recursively until all the non-fixed language segments are transformed level by level, in which process, concerning the current non-fixed language segment of the source language, first, all the components of the current non-fixed language segment are transformed into the target language respectively, and then, the current non-fixed language segment is transformed into the target language according to the matching non-fixed language segment transformation rule, the result of the transformation of the current non-fixed language segment being returned to be used by the non-fixed language segment at the higher level, until the non-fixed language segment as the initial data is transformed into the target language. 
     The Implementation of the Invention 
     Although the novel and improved machine translation method and system according to the preferred embodiments of the present invention has been described, the present invention is not restricted to such examples. It is evident to those skilled in the art that the present invention may be modified or changed within a technical philosophy thereof and it is understood that naturally these belong to the technical philosophy of the present invention.