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Wear a mask when going out and wash hands with soap.

外出时戴上口罩，用肥皂洗手。

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Whenever you go out, don't forget to put on your mask.

无论你何时外出，别忘了戴口罩。

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It's one of the duties of the mask's plot to get the Lady out of her seat.

将女士从座位中救出时《面具》情节的一个职责。

耶鲁公开课 - 弥尔顿课程节选

The microscopic whiskers can stop bacteria in a face mask or filter out water droplets in a hospital's air conditioner.

FORBES: Back on Track

According to the affidavit, police interviewed Dube's brother, who told them Dube gave him this account of what happened: He waited in the woods wearing a ski mask, jumped out of the bushes, duct-taped Cable and put her in the back of his father's truck.

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At Passover, millions of Jews forgo leavened grain and eat matzo, tricking out the cracker in various ways to mask its essential, incontrovertible blandness.

WSJ: Matzo Brei Recipes for Passover: Easy as Brei