When it emerged towards the end of the 1980s as a purely text-based medium, it was seen as a tool to pursue knowledge, not pleasure.
20世纪80年代末，当它作为一种纯文本媒介出现时，它被视为一种追求知识而非快乐的工具。
The knowledge representation method of blackboard framework has been applied to the Blackboard Framework Based Expert System Tool (BFBEST) and the results are satisfactory.
黑板框架的知识表达方法，已在医学专家系统开发工具BFBEST中获得了成功的应用，并取得满意的效果。
Based on this idea, in this paper the sets information system and inclusion degree, the tool of knowledge discovering in the information system had been introduced in firstly.
基于这种思想，本文的工作首先是引入了集值信息系统以及在信息系统上进行知识发现的工具——包含度。
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