The ranking system groups documents of a search result based on their relatedness, meaning that they are directed to similar topics.
该排列系统基于它们的关联性而将搜索结果的文档分组，意味着它们被指向相似的主题。
The ranking system groups documents of a search result based on their relatedness, meaning that they are directed to similar topics.
该排列系统基于它们的关联性而将搜索结果的文档分组，意味着它们被指向相似的主题。
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