该方法利用源语言岐义词不同语义下目标语译文的单义同义词集合，定义并构造等价伪译词。
EPT is constructed by using non-ambiguous words of target language, which is semantically equivalent to the source ambiguous words.
然后介绍了以S语言为源语言运用编译构造原理和实现技术设计s语言的编译程序的词法分析器的过程和关键技术。
Then regard s language as the source language and use the compile principle and realized technical to design the lexical analysis of s language.
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