Since these fields won't ever make sense to use in an actual search, you can decrease the amount of work Lucene does by marking them as not indexed for searches.
既然这些字段绝不会在一次真实的搜索中用到，那么你就能把它们标记为不被索引而减少Lucene的工作量。
Search engine's are smart enough to know when keyword positioning does not make sense and will penalize you for it.
搜索引擎的非常聪明，知道什么时候关键字定位没有意义，并将惩罚你。
Search engine's are smart enough to know when keyword positioning does not make sense and will penalize you for it.
搜索引擎的非常聪明，知道什么时候关键字定位没有意义，并将惩罚你。
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