on the fly
01
匆忙地, 在奔跑中
on the run or in a hurry
02
即时地, 在移动中
while moving or in the middle of doing something
Slang
例子
I did n't have time to make notes, so I just wrote them on the fly.
我没有时间做笔记，所以我只是即兴写了它们。
We 're making decisions on the fly during this road trip.
我们在这段公路旅行中即兴做决定。
