However, lacking of a universal and explicit concept representation makes it difficult to share and reuse course resources.

但是由于缺乏统一明确的概念表示，使得课程资源共享和重用难度大。

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In graphic interfaces icons are simplifications of complex proccesses and work connecting a representation to it’s concept.

在图形用户界面中，图标是复杂过程的简单表达，把一个流程的概念和表现连接了起来。

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I think that the goal of authority control is to come up with a single representation for a concept or a thing.

我认为规范控制的目的在于解决概念或者事物的单一表现的问题。

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For those who are unfamiliar with the concept, a word cloud is a visual representation of the most frequently used words in a given document or, in this case, a speech.

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