They have broken the regular grammar rules, and have an active effect in special contexts.

它们突破了正常的语法结构规则，在特定语境中产生积极的表达效果。

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A regular expression is similar (and in fact suffices for this particular grammar production).

正则表达式与此相似(并且事实上它能够满足这种特定语法产品的需要)。

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How to test if grammar is regular (using a library or a framework)?

如何测试如果语法规则(使用库或框架)？

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How to test if grammar is regular (using a library or a framework)?

如何测试如果语法规则(使用库或框架)？

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