众所周知,语言是人类最重要的交际工具,没有它就没有人类。可是会运用语言的人很可能产生一种错觉,以为了解语言的结构和功能是完全不必要的,一个人能表达自己一般的和专门的思想,好象这样也就足够了。其实,语言如同空气一样,我们呼吸着它,但因忙于自己的事务,通常并不觉察或者根本就不去想自己的呼吸。当然特殊情况除外。而在另一方面,又很难找到另一种社会现象象语言 It is well known that language is the most important communication tool of human beings, and without it there is no human being. However, people who use language are likely to produce the illusion that it is totally unnecessary to understand the structure and function of language. It is sufficient if one can express his own general and specialized ideas. Actually, the language is the same as the air. We breathe it, but we are usually not aware or do not think about our own breath because we are busy with our own affairs. Of course, except for special circumstances. On the other hand, it is difficult to find another language of social phenomena