The initialization , globals , and grammars sections are next .
接下来是初始化、全局变量和文法部分。
Unlike in a context-free grammar or other generative grammars , in a parsing expression grammar there must beexactly one rulein the grammar having a given nonterminal on its left-hand side .
As societies adopt a written language for cultural reasons , their grammars often change .
一个社会往往因为文化的原因而选择某种语言作为书面语,其语法则时有变化。
The speech recognizer cannot have that many grammars active at once .
语音识别器不能同时使用很多语法。
It is widely believed that every word has a correct meaning , that we learn these meanings mainly from teachers and grammarians , and that dictionaries and grammars are the supreme authority in matters of meaning and usage .