Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
But it'll be better tomorrow.
但是明天就会好多了。
I'm too slow.
我太慢。
Excuse me, Mr Green. I can't find the twins.
对不起，格林先生，我找不到那对双胞胎了。