The order of the productions in a.jj file is generally irrelevant except in this case, where the name of the topmost production in the grammar is used to invoke the parser.
jj文件中的结果顺序通常是无关的，而本案例除外，在本案例中，语法中最顶部的结果名称用于调用解析器。
2
The extend-grammar query rules: The query rule consists of a do_you_know production, followed by a name or a proper name.
The purpose of this thesis is to testify task-based teaching approach is more effective than the traditional PPP(Presentation, Practice and Production)method in grammar teaching in vocational schools.