Meanwhile, a recommender system is built on the theory we just discuss.

同时，基于提出的理论，结合实际，构建出电子商务推荐系统。

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Recommender system is the application of information filtering technology.

推荐系统是信息过滤技术的应用。

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Recommender system is the application of information filtering technology.

推荐系统是信息过滤技术的应用。

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