If you go out without a mouth mask, you'll probably catch your death of cold.

如果你外出不带口罩，很可能就要患重感冒。

youdao

The nonwoven products include compressed towel, compressed facial mask, facial mask, household cleaning-cloth, and disposable mouth mask and so on.

无纺布制品主要产品有以下系列：压缩毛巾，压缩面膜，面膜贴，家用擦布，一次性口罩等。

youdao

The sound-insulation mouth mask not only effectively prevents the voice of a user from spreading out, but also has simple structure and is easy to use.

该隔音口罩不仅可以有效防止用户的话音 向外传播，而且构造简单，易于使用。

youdao

The old man wore thick gloves on his hands and a mask over his mouth and nose.

VOA: special.2009.05.23

Emergency personnel attempted mouth-to-mask resuscitation and chest compressions, to no avail.

CNN: Police: Trayvon Martin's death 'ultimately avoidable'

And, of course, he is wearing the mask, which covers his mouth and lower face.

FORBES: The Dark Knight Rises: Clearing Its Own Bar?

We at She Negotiates see moving high potential and high-powered women into greater positions of greater responsibility and leadership as tantamount to the airline injunction to put your breathing mask over your own nose and mouth before you turn to put masks on your children.

FORBES: Will Your Mother Live in Poverty?