A street performer wears a surgical mask painted with an image of teeth in Mexico City April 28, 2009.

一个街头的表演者带着画有牙齿图像口罩在墨西哥城，4.28,2009。

youdao

If I'd know I was cming to a place that had nothing but fresh air, I would have brought a surgical mask.

如果早知道我要到一个只有新鲜空气的地方来的话，我就会带一只口罩来了。

youdao

If I'd known I was coming to a place that had nothing but fresh air, I would have brought a surgical mask.

如果早知道我来的地方只有新鲜空气，我就会带一只口罩来了。

youdao

Apart from a surgical mask, nobody wears any protective garment or gas masks.

CNN: STORY HIGHLIGHTS

All visitors had to scrub down before entering the room, and her mother had to wear a surgical mask if she slept there.

CNN: Summer camp, sick kids, new world view

Patients who are ill should be asked to wear a surgical mask to contain their secretions, he says, and they should use tissues and wash their hands frequently to prevent touch contamination.

CNN: STORY HIGHLIGHTS