The grammars for complex languages are commonly described using BNF (Backus-Naur Form) notation or its close relative, EBNF (Extended BNF).
复杂语言的语法通常都是使用BNF（巴科斯-诺尔范式，Backus-NaurForm）表示法或者其“近亲”―EBNF（扩展的 BNF）描述的。
My works maintains: the first is to change the extended BNF of TTCN-3 into the normal BNF;
我的工作主要有：一是对TTCN-3的扩展语法规则范式进行改写；
My works maintains: the first is to change the extended BNF of TTCN-3 into the normal BNF;
我的工作主要有：一是对TTCN-3的扩展语法规则范式进行改写；
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