Cleans
n. 打扫；精煤（clean的复数）
🗣️ 情景例句
I studied medicine there.
我在那里学医学。
Lava flowed out of the crater.
喷火口流出了熔岩。
However, in recent times the old-age pension has only been paid to the poorest people because there has been an increase in the number of people out of work.189
然而阳近一段时间，老年养老金只付给那些最穷的人，因为失业的人数一直在增长。