英文: They had the Smog checking license.
中文: 他们有做尾气检查的牌照,就给他们做了。英文: Smog has thickened the air.
中文: 烟雾于天空阴霾。英文: We were prevented by heavy smog from seeing anything.
中文: 浓雾使我们看不到任何东西。英文: Black smog reduced visibility to about fifty yards.
中文: 黑色的烟雾使能见度降到大约五十码左右。英文: Smog hung in the sky (over the city).
中文: (城市)上空烟雾弥漫.