The intent here is for you to directly try out this activity to get the knowledge and experience of how straightforward it is to construct this kind of environment.
这样做的目的是让您直接地实现出这个过程，从而获取如何直接构造这类环境的知识和经验。
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And I hope to show how we construct useful, practical concept-oriented catalogs for the future, building both on the knowledge and expertise we have in libraries, and on the contributions of others.
Historians construct history by closing the gaps in their knowledge about the past, enlarge our under - standing, and enliven their narrative by drawing logical inferences from their assembled facts.