美国有一半以上的人口呼吸污染空气。

Half of US population breathe polluted air.

youdao

由于呼吸污染空气导致的碳末沉着症并不多见，吸烟会引起更明显的碳末沉着症。

Here is anthracotic pigment in macrophages in a hilar lymph node. Anthracosis is nothing more than accumulation of carbon pigment from breathing dirty air.

youdao

当然，你需要保暖，也不能不做饭，但你可以减少呼吸受污染空气的量。

Of course, you have to keep warm and you can't stop cooking, but you can reduce the amount of bad air you breathe.

youdao