If you insert the object as a link, only a reference to the file name is inserted. The file size of the document increases only by the path and file reference. If you open your document on another computer, however, the linked file must be in exactly the same position as given by the reference in order to view the object in the document.
如果把对象当作链接插入，则只是在文档中插入了一个文件名引用。该文档文件的大小只增加了这个路径和文件说明。但是如果在另一台计算机上打开文档，那么该链接的文件必须重新处于引用所表述的准确位置，才能在文档中显示该对象。