Languages that are distributed in different places use long-term development processes and have accumulated common or unique experiences in production and life. These experiences or knowledge systems are all condensed in the language. Each language group has a different understanding of nature. It has reached different depths and formed a complementary distribution of cognitive structure, which together constitutes a broad and deep knowledge system for human beings. The text is intended to explain:. ['Human knowledge systems are preserved and constructed verbally by different groups.', 'Human groups develop and use experience and knowledge through language.', 'Language promotes the differentiation of the knowledge system of various groups.', 'The experience and knowledge systems of human groups vary in depth and breadth.']