This paper divides ambiguity in English into intentional and unintentional ambiguity in terms of practical effect,analyzes systematically their causes,and puts forward avoiding ambiguity in practical comˉmunication and making full use of intentional ambiguity to reach the goal in communication.

This paper divides ambiguity into intentional ambiguity and unintentional ambiguity, gives examples combined with communication teaching and forwards methods to avoid and eliminate ambiguity so as to help students clear obstacles to communication.

The passage talks from the sector of communication,the ambiguity can be divided into intentional ambiguity and unintentional ambiguity,and we give examples combined with teaching activities.

The ambiguity of object-oriented language is discussed in this paper.

Seeing that problem is present in natural language formalization research, this paper tries to make analysis and discuss for few basic problem on ambiguity and formalization and system model.

The implication of English syntactic ambiguity, anaphors and elipses are research points of modern linguistics in that it remains a sticky problem of English acquisition as a foreign language.

In this paper some auxiliary theorems on fuzzy context free languages are given and its different meaning is discussed.