&B{airs and graces}derogatoryan affectation of superiority

(貶)裝腔作勢

&B{by air} in an aircraft

空運，乘飛機

all goods must come in by air.

所有的貨物必須用空運。

&B{in the air} noticeable all around; becoming prevalent

顯而易見的；流行中的

I smell violence in the air.

我明顯地聞到了暴力的氣息。

&B{on 或 off the air} being (or not being) broadcast on radio or television

廣播，在廣播／停止廣播

&B{take the air} go out of doors

去戶外

&B{up in the air} (of a plan or issue) still to be settled; unresolved

（計劃，問題）懸而未決的

the fate of the power station is up in the air.

發電站的命運懸而未決。

&B{walk 或 tread on air} feel elated

得意洋洋

in the air

Abroad; prevalent

廣泛的；流行的

Excitement was in the air.

到處充滿了興奮之情

up in the air

Not yet decided; uncertain.

未決定；未確定