Professor Shenghuan Xu’s theory on "mental model based on stereotypical relation" illustrates the important function of stereotypical relation in inference of utterance’s implication.Xu points out that utterance implication inference is the process in which the interpretation of the utterance comes from the stereotypical relations concerned to supplement and/or elucidate the meaning of the utterance.Guided by Xu’s theory,the present paper analyzes the pragmatic function of stereotypical relation...