In either case, a grammar is declared in a manner similar to those created to parse artificial languages.

不论在哪种情况下，语法规则的声明都类似于解析人工语言的语法声明。

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Parser generators take the grammar of a language and generate code to parse it.

分析器产生器的作用是接收一门语言的文法并产生代码以分析该语言。

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We will now showcase specific abilities of the Parse: : RecDescent grammar by adding on to the UI features from a simple event loop and a simple user interface.

现在，通过在简单事件循环和简单用户界面的UI功能基础上再增加一些功能，我们将具体展示Parse： RecDescent文法所具有的特定能力。

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