adj.宜于飞行的(适航的;可以在空中飞行的)
The bird caught a bug on the fly. 那鸟在飞行中捉住了一只昆虫。
I'd like to fly to Glasgow on the fifth of May. 我想5月5日飞往格拉斯哥。
He said he wanted his son to fly right. 他说他希望他儿子做个正派的人。
The general decided to fly up to see his soldiers. 将军决定飞向北部去看看他的士兵们。