Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
Of course!
当然有！
Here are you Chinese Yuan for $ 1000. And your passport and exchange memo.
这是您1000美元所换的人民币。给您护照和兑换清单。
Yes. I suggest taking a lot of vinegar.
是的。我建议多带些醋。