用正规文法和正规表达式描述了程序语言的单词符号的结构，用状态转换图构造了识别单词符号。
The paper describes symbolic structure of word of program language with regular grammar and regular expression, constructs converted-state chart to identify word symbol.
本文描述的计算机选案子系统采用语义文法结构，中间语言采用语义依存树的形式。
The computer aided tax system described in this thesis is a semantic grammar system, with the semantic dependency tree as the intermediate language.
研究了编译技术，针对NC代码的特点，对NC代码进行了文法描述，并设计了NC代码编译器的总体结构。
Then studies compiler techniques, in view of the characteristics of NC code, describes a grammar of the NC code, and designs the overall structure of the NC code compiler.
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