Therefore, you should carefully check and consider any index identified as unused before you actually drop it.

因此，在删除识别到的未使用索引之前，一定要小心检查和认真考虑依赖它们的其他sql语句。

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Let your hands and arms drop naturally to your side, gently fold both index fingers together, without wringing or gripping your hands in any way;

将手臂自然地垂在身体两侧，轻微屈起食指，不要扭在一起或紧握拳头；

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With any figure below 50 indicating a drop in output, the Markit index has now posted contractions for six of the past seven months.

BBC: Eurozone services sector 'remains weak'