Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
I'm late for dinner at my house.
我回家吃晚饭要迟到了。
Excuse me, how can I get to the bus station?
对不起，汽车站怎么走？
Of course I will. What about you? Aren't you going to Xi'an soon?
我当然会的。你打算上哪度假呢？你不是很快就要去西安了吗？