Ppmv
abbr. parts per million by volume 百萬(wàn)分體積比
??? 情景例句
lots of things to do.
許多事情要做。
This man is painting the house the wrong color.
這個(gè)男人在漆著和房屋不相稱的油漆。
Only two stray dogs benefited from all this confusion, for they greedily devoured what was left of the cake.
只有兩只野狗從這一片混亂中得到好處，它們貪婪地吃掉了剩下的蛋糕。