When pure rule ( chart)-based bottom-up method being used to parse sentences, there are many ambiguous meanings. By introducing stochastic Chomsky normal form ( SCNF), partial syntactic ambiguities are eliminated to some extent; 对基于纯规则(chart)的自底向上方法进行句法剖析后出现的大量无法消解的歧义现象,通过引入概率型Chomsky范式(SCNF)在一定程度上消除部分句法结构歧义;