For the first, content-based analysis, content associated with the item, especially text, is used to compute similarity.
第一种，基于内容文本的检索，和item相关的内容，特别是文字，可用来计算相似性。
It has a broad prospect to compute text similarity in terms of the digital library system.
文本相似度的计算在数字图书馆系统里有着广泛的应用前景。
We introduce the data structure used to search for candidate question set and the method to compute sentence similarity in detail.
文中着重介绍了用于查找候选问题集的数据结构以及句子相似度的计算方法。
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