对交际需要的研究目的在于描述语言是如何满足不同环境的交际需要。
The research purpose of communicative needs is to describe how languages fulfill different tasks under different Settings.
本文论述了KADS建模方法的主要特点、KADS建模的形式描述语言和KADS建模的实现环境。
This paper discusses in detail the three aspects of KADS modeling method, which are the main characters, the formal descriptive language, and the realizing environment of KADS modeling method.
交互虚拟环境中，VRML作为三维场景描述语言得到广泛应用。
In interactive virtual environment, there are wide applications of VRML which is the 3d describing language.
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