Due to different aspects and different attitudes towards vague language, so there is a lasting interest in the study of vagueness. As has been mentioned above, vague language is an intrinsic part of nature Language. So, vague language is hard to be defined. The above persity of definitions also demonstrates that. And there must be some other labels that are not included. No matter how persified these definitions are, it is concluded by the present study that vagueness has been observed to occur widely in language use, and most of the researchers hold that precision in language is relative while vagueness is absolute. Although researchers have different emphases, they still have a lot of things in common, so generally speaking, vagueness in this thesis refers to the uncertainty of language, and the vague language means fuzziness, ambiguity and implication, it is an expression or word. 浅析模糊语在跨文化商务英语交际中的语用功能(3):http://www.751com.cn/yingyu/lunwen_18495.html