中国北方城市经常被雾霾所笼罩，尤其是在寒冷的冬季，家庭和发电厂都是靠烧煤来取暖。

Northern China is often cloaked in smog, especially during the cold winter months when homes and power plants burn coal to keep warm.

youdao

周日，雾霾笼罩下的中国城市由于能见度低而取消了飞机航班，北方城市污染预警的第二天有很多家长带孩子去医院。

A smog-shrouded Chinese city canceled airline flights Sunday due to poor visibility and parents took children to hospitals on the second day of a pollution alert across the country's north.

youdao