vapour

Water vapour condensed into droplets on the cold window. ▶

水蒸气在冰冷的窗户上凝结成了水滴。

As global temperatures rise, the atmosphere can hold more water vapour, which further strengthens the greenhouse effect.

随着全球气温上升，大气能容纳更多水蒸气，从而进一步增强温室效应。