Where, following an abnormal condition, the removal of dust accumulations or layers cannot be assured, then the area is to be classified zone 21.

如果不能保证排除可燃性粉尘堆积或粉尘层时，则应划分为21区。

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We pray for strength and humility, and some messenger of Satan torments us until we lie in the dust crying for its removal.

我们求能力和谦卑，神却给我们撒但的苦害。 直到我们躺在尘土里求告他。

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To do a simple clean the inside of a car, car dust removal, use vacuum to dust mat and seats in the gap.

要对车内做一次简单的打扫，除去车内的尘土，用吸尘器吸去脚垫及坐椅缝隙中的灰尘。

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Brushing the surface of rocks with Curiosity's dust removal tool first enables the arm-held hand lens camera and X-ray spectrometer, in particular, to see features that might otherwise be obstructed.

BBC: Curiosity Mars rover deploys its rock brush