副詞 in a flash:

1. without any delay
   同義詞：instantaneously, outright, instantly

1. I didn't get the number of the car that knocked you over. It was gone in a flash. All I know is that it's a big, brown car.
   我沒有記下撞倒你的那輛汽車的車號，它一下子就開走了，我只知道那是一輛棕色的大轎車。
2. The answer came to her in a flash of inspiration.
   她突然來了一陣靈感，答案想出來了。
3. In a flash, the truth came to him.
   突然間，他明白了真相。
4. I'll be back in a flash.
   我馬上就回來。