It consists of a series of rules that lex translates into the lexical analyzer.
它由一系列规则构成，lex将这些规则翻译为词汇分析器。
An important part of the input process is carried out by the lexical analyzer.
输入过程的一个重要部分由词法分析器来进行。
Their relatively simple preparation of the lexical analyzer, and we need people to see.
自己编写的比较简单的词法分析器，需要的人可以看看。
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