A large meteorite collision, however, would probably create a sudden bright flash of light, and no extant historical records of the time mention such a flash.

然而，大型小行星的撞击可能产生突然的强闪光，而现存的那时的历史记录中没有提到过这样的闪光。

youdao

This time the flash fires just the right amount of light to "fill-in" the subject with the flash produced light. Now you have a rather nice shot where you can see the subject and the background.

然后你再次拍下照片，闪光灯发出刚够照亮拍摄主体的闪光，这一次的照片要好多了，你可以同时看清主体和背景。

youdao

If you bounce the flash off a wall to the side of you, or behind you, then the source of light relative to the subject, is much larger than if you had shot with the flash straight on.

如果你把闪光灯打到你旁边或身后的墙上，相对于拍摄主体来说，此时的光源面积要比直接将闪灯打到主体上要大的多。

youdao

He said he could see the flash of light from Confederate guns along a line a kilometer long.

VOA: special.2009.12.17

He staggered backward and a flash of light appeared from his side.

NPR: Excerpt: 'Killer Weekend'

It's possible that a flash of light and shaking of the ground would be the first indications that something happened.

CNN: While you were working: An asteroid just flew by

The most popular theory holds that dark matter is made up of relatively heavy particles which, when they encounter one another, "annihilate" with a flash of light that the Fermi telescope can see.

BBC: Fermi telescope may change to dark matter hunting