on the fly

• 非正式表达，指在做某事的过程中即时、快速地完成，无需事先准备或计划，常随情况发展而灵活应对。也可指在计算机系统运行过程中动态进行，而不中断或重启。

An informal expression meaning to do something quickly and spontaneously, without prior preparation or planning, often while the situation is unfolding.

1. While in motion or without stoppingB2informal

   Doing something quickly and without preparation, often while moving or while something else is happening.

   在飞行中

   • He ate his breakfast on the fly before catching the bus.
   • The programmer fixed the bug on the fly during the live demo.
   • She made decisions on the fly as the situation changed.

2. Improvising or adaptingB2informal

   Dealing with a situation as it happens, without prior planning.

   随机应变

   • The comedian worked on the fly, responding to the audience's reactions.
   • We didn't have a script, so we just acted on the fly.
   • The chef created a new dish on the fly using leftover ingredients.