Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
I'm a workaholic, so for me vacations are very boring.
我是个工作狂！度假对我来说太无聊了！
Why don't you get dressed now?Put on your work clothes.
为什么你不现在穿好衣服?穿上你的工作服。
The Ambassador's wife went on asking questions, when she suddenly noticed a big hole in her husband's hat.
大使夫人继续提出问题，她突然又发现丈夫的帽子上有个洞。