n. 空气,空中;(the air)天空,气氛,氛围 vt. 使通风
来源于希腊语aer,拉丁语aer,古法语air。
-aer-空气 ←e和i互换→ air空气
例:n. the mastery of the air 制空权air of tension 紧张气氛The money vanished into thin air 钱已经消失殆尽了。to send troops to Europe by air 空运部队到欧洲There is a feeling of unrest in the air. 到处弥漫着不安的感觉。