So, it is worthwhile to check which statements were actually used before dropping an index.
所以，在删除索引之前，有必要检查哪些语句被真正使用。
Before you go outside to play always check the pollution index.
那你在出去玩之前，一定要经常检查空气污染指数。
If you're searching for a specific company, check the Index on page 210.
如果你要寻找一个特定的公司，可以在210页进行检索。
If you're searching for a specific company, check the Index on page 210.
如果你要寻找一个特定的公司，可以在210页进行检索。
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