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。

youdao

To ensure the information to the user, the actual provisions will be completed with the introduction of a conformity marking.

为了确保提供给用户的信息，实际的规定将通过采用符合性标志来完成。

youdao

We are guilty of that most inexcusable of social misdemeanors, failing to wish a dear friend Happy Birthday on the actual day marking their birthday.

FORBES: Happy Belated Birthday, Spider! (SPY Celebrates 20th Anniversary Amidst ETF Boom)

But head teachers have challenged Ofqual to produce evidence - and had raised the question as to whether the regulator's investigations had ever looked at actual exam papers with evidence of such over-marking.

BBC: Exam grades changed for 45,000 in re-marking