Everybody has a language system, an individual "bank of active language knowledge", which contains a variety of types of writing.
每个人都掌握了一套包含不同语体的语言体系，既个人的“活用语言知识库”。
Mathematical class culture is consisted of the mathematical value system, thinking methods, knowledge and experience, and language and sign.
数学课堂文化由四个部分组成，即价值体系、思维方式、知识经验和语言符号。
A universal system model about database natural language interface, which separates the programming from Knowledge-Base is constructed.
构造了一个程序设计与知识库相分离的通用的数据库自然语言接口系统模型。
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