BHA's data base concept is proposed.
提出了BHA数据库的概念。
Based on whole system frame, knowledge-base concept design, logic design and physical design began.
在此基础上,进行系统知识库的概念设计、逻辑设计与物理设计。
In this paper, the base concept of reliability of structures and the history of research of reliability theory is presented.
介绍了工程结构可靠性的基本概念,回顾了可靠性理论的研究历史。
They are really a difficult concept to grasp when you have no base knowledge of it.
当你没有基础知识时,冠词确实很难掌握。
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