Calculates a score for each document that matches a given query and returns the most relevant documents ranked by the scores.

计算每个文档匹配给定查询的分数，并根据分数返回最相关的文档。

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For example, if you remove the ability of a query word to match more than once, or more than once in the same field, the distribution of the scores within a record will change dramatically.

例如，如果删除多次匹配查询词或多次匹配同一字段的功能，则记录中的分数分布将发生很大变化。

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For example: Portlet will query the database for the current program and display a list of names, geographical locations, and point scores for the top 10 highest point values.

例如：Portlet将查询当前程序的数据库，并显示名称、地理位置列表，以及分值最高的前十位的得分。

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