该排列系统将文档排序以保证最高排列文档可以包含覆盖每一个主题的至少一篇文档，那就是说，来自每一个组的一篇文档。
The ranking system ranks the documents to ensure that the highest ranking documents may include at least one document covering each topic, that is, one document from each of the groups.
正常排列是指如果浏览器忽略定位属性的话文档将如何显示。
The normal flow is how the document would appear if the browser ignored positioning properties.
作为可选项，搜索能将符合条件的文档按照搜索词语的出现频率并且对比文档长度来排列。
As an option, the search can rank matched documents based on the prevalence of the search words as compared to document length.
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