语义不明确包括多义(歧义)、模糊与概括(笼统). Semantic opacity covers such issues as ambiguity,vagueness and generality definition of Vagueness is that: The term “vagueness” seems very hard to be defined since different people have different views. As to the definition of vagueness, different linguists have given their different statements. 不过你可以去找找语言学书上一个叫Pierce的人~他定义过~