Pollutants
n. 污染物质（尤指工业废物）( pollutant的复数形式 )
🗣️ 情景例句
It took years of hard work.
那需要多年辛苦工作。
Let us talk about it at our leisure.
那件事我们有空再谈吧。
Once a year, a race is held for old cars.
旧式汽车的比赛每年举行一次。