Studying the descriptive geometry course was the process of knowledge construction, which mainly included organizing knowledge unit and knowledge structure chain step by step.
画法几何学课程的学习是逐步建立知识单元和知识结构链的知识建构的过程。
A descriptive approach usually lacks systematic explanation and doesn't give any real knowledge why it happens in this or that way and in any other.
一般的描述法，通常，缺乏系统的解释，不能够给出为什么会发生这样或那样事情等等的真正原因。
A descriptive approach usually lacks systematic explanation and doesn't give any real knowledge why it happens in this or that way and in any other.
一般的描述法，通常，缺乏系统的解释，不能够给出为什么会发生这样或那样事情等等的真正原因。
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