Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Where is 83 Wooster Street? Wooster
街83号在哪
Do you have a phone book(directory)?
你有电话簿吗？
Our project must proceed at a reasonably quick tempo. Surely one month is ample time, isn't it?
这个计划必须尽速进行。一个月的时间应该够了吧？