A probabilistic context-free grammar (or PCFG) is a context-free grammar that associates a probability with each of its productions.
probabilistic context - free grammar(或者说是PCFG)是一种上下文无关语法，它将其每一个产品关联到一个概率。
A probabilistic context-free grammar (or PCFG) is a context-free grammar that associates a probability with each of its productions.
probabilistic context - free grammar(或者说是PCFG)是一种上下文无关语法，它将其每一个产品关联到一个概率。
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