Firstly, the user has to have sufficient knowledge to be able to make an initial query which is at least somewhere close to the documents they desire.
首先，用户需要有足够的知道做出最初的查询，它至少与他们想要的文档是接近的。
Users of the search engine go through in the concept lattice whose first concept node is built by initial query and extend or refine the query through interactive mode.
利用概念格的概念检索和可视化格结构，使搜索引擎查询扩展方法具备了概念化和智能化的特点。
That is, they issue an initial broad query that reassures them that the search system gives access to at least some documents in the area they are interested in.
也就是说，他们提供了一个初始主查询，该查询可以保证搜索系统至少能够访问他们感兴趣的区域中的一些文档。
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