Ppm.
[医] 兆比率(百万分之几)
🗣️ 情景例句
I know you want to get to it.
我知道你想要开始啦。
Straws show which way the wind blows.
草动示风向。
We'd like a chance to bid on this business.
我们希望能有机会投标这笔生意。