Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Well, let's take everything to the living room.
嗯， 我们把东西都放到客厅去。
Change lays not her hand upon truth.
真理不变。
'Do not touch the exhibits. Some of them are dangerous!'
“切勿触摸展品，某些展品有危险！”