Tags - bookmarking sites have rich semantic information which can be used for content - based retrieval and recommendation.

标签为 基于 内容的检索推荐提供了丰富的语义信息,标记行为的协同特性为协同过滤推荐创造了条件.

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We have taken in content - based retrieval, but there are a lot of projects to be studied.

目前,基于内容的检索研究已经取得了很多成果, 然而还有许多问题需要去探索.

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