Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Right.
对。
No, I'm not.
不，我不是。
'Then I'll come with you,' he answered.'There's always plenty to read in the waiting room!
“那我也跟你去，候诊室里总有很多东西可供阅读！”他回答。