vapor/ ˈveɪpər /

1.noun[c/u] 

汽;雾;烟

Water vapor from the bathroom might condense and create conditions of damp.
来自浴室的水蒸汽会冷凝,并制造潮湿。
2.noun

蒸发,汽化

3.noun[u] [Medicine] 

吸入剂