Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Always got something to say.
总有话要说。
May I ask the reason for your remittance?
可以请问汇款的原因吗？
If you would only try, you could do it.
只要你肯尝试，你一定能做这件事。