Sootfall
n. (工业区的)煤烟降落(量)
🗣️ 情景例句
Who's that?
谁呀？
Lazy folks take the most pains.
懒汉多吃苦。
It did not take the firefighters long to put out the fire, and they at once started to look for causes of the fire.
消防队员没花多时间就把大火扑灭了，他们马上开始调查火灾发生的原因。