smog

/smɑg/

air pollution by a mixture of smoke and fog

中文释义：烟雾；雾霾

The heavy smog reduced visibility to less than 50 meters in the city center.

浓重的雾霾使市中心的能见度降至不到50米。

Many residents wear masks to protect themselves from the harmful smog.

许多居民戴口罩以保护自己免受有害雾霾的伤害。