Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
Anything can I help you with?
有我能帮忙的地方吗？
Yes,and it goes beautifully with your pants.
好看，配上你的这条裤子美极了。
Is there a minimum order?
有最低订购量的限制吗？