英语语法分析

Cars cause pollution, both smog and acid rain.

汽车引起污染，既有烟雾又有酸雨。

《柯林斯英汉双解大词典》

The sky over the city was overspread with heavy smog.

城市上空罩上了一层浓重的烟雾。

Under the cover of the smog, He snatched the pot on the sly.

在烟雾的掩护下，他偷偷地拿走了那只壶。