Ppm.
[医] 兆比率(百万分之几)
🗣️ 情景例句
It's quite lovely.
相当好看。
I know the boy whose father is a banker.
我知道那个男孩的父亲是银行家。
He has deliberately chosen to lead the life he leads and is fully aware of the consequences.
他是故意在选择过那种生活的，并完全清楚以这种方式生活的后果。