搜索让你可以用关键字找到你的订阅源里的相关条目(如果你想搜索所有的blog，那么试试blog search)。
Search lets you use keywords to find items in your subscriptions (if you're looking to search all blogs, give blog search a try).
每一个索引文档也具有多值字段unid，其中包含与为该索引文档分配的关键字相匹配的源数据库中的所有文档的UNID。
Each index document also has multi-value field UNIDs, which contain the UNIDs of all documents in the source database that match the keyword assigned for that index document.
每一个源文档的关键字持有者文档的数目与每个文档的搜索字段的数目相同。
The number of keyword holder documents per source document is the same as the number of search fields in each document.
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