Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Normally I go to bed at about ten o'clock.
通常我在 10:00 睡觉。
If one desires to succeed in anything, he must pay the price.
如果想做成点事，就得付出代价一干。
How did the game turn out?
球赛结果如何？