London is one of the most heavily polluted cities in Europe.

伦敦是欧洲污染最严重的城市之一。

The installation of the mondo athletics tracks has been delayed by heavy rain and the bay which will host the sailing event is still heavily polluted.

因暴雨天气，“盟多”跑道建造工作延期，帆船比赛的“海峡污染”依然严重。

That's especially concerning to residents of New Delhi because researchers have compared living in a place with heavily polluted air to smoking a pack of cigarettes everyday.

这对新德里市民来说至为重要，因为研究者认为市民居住在重污染区与每天吸一包烟的后果一样。