無煙霧的,不排放煙氣的

Smog hung in the sky (over the city). (城市)上空煙霧彌漫。

Black smog reduced visibility to about fifty yards. 黑色的煙霧使能見度降到大約五十碼左右。

Smog used to bring London traffic to a standstill. 過去倫敦的交通常因煙霧而受阻。

The air is polluted with the smother of traffic and industrial smog. 空氣被令人窒息的車輛廢氣和工業(yè)煙霧污染了。

They had the Smog checking license. 他們有做尾氣檢查的牌照，就給他們做了。

The city was overhung with the pollutant smog. 整個城市彌漫在污染的濃霧之中。