机械产品设计知识的表达、获取是基于知识设计系统的基础和关键。
Knowledge representation and acquisition are the basis of knowledge based design system.
模式语言可以让你贯穿整个设计，然而，我们也可以使用这些小的结构，基于一点一点的工程知识。
A pattern language guides you through the whole design, whereas we have these little pieces, bites of engineering knowledge.
根据USBD(基于统一场景的设计)概念补足业务知识。
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