Automated parser generators alleviate that difficulty.

自动化解析器生成器减轻了这种困难。

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Note that other parser generators, such as ANTLR, use similar approaches.

注意，其他的解析器生成器也是采用类似的方法，比如ANTLR。

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They are a simple but powerful generalization of regular expressions that are easier to work with than the LALR or LR-1 grammars of traditional parser generators.

它们是简单但功能强大的泛化正则表达式，比起传统的LALR或者LR-1语法的解析器生成器来说更易于使用。

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