摘要
people adhere to one or more maxim but violate another at the same time. And the following examples show that the use of vague language violates the maxim of Cooperative Principle,vagueness is a language unit,the vagueness caused by the use of vague language would devaluate the truth of the information given by the speaker
出版日期
2009年08月14日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
