Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Please, sit down. What can I do for you?
请坐下。我能为你们做什么呢？
The tongue is not made of steel,yet it cuts.
舌头不是钢，一动把人伤。
and of offering to the tenants offices and apartments that please them.
和向租房人提供使他满意的办公室和住房。