At the performer's command, the lights to flash off, then back on.

在魔术表演者的命令下，灯光关闭，之后再打开灯光。

youdao

But what if you don't have a wall or other surface to bounce your flash off of?

但是如果没有墙或天花板可用呢？

youdao

The droplets immediately flash off to steam, carrying away tremendous amounts of Btus.

水滴立即闪蒸成蒸汽，带走大量的热量。

youdao

What I'll always remember was seeing him, about an hour later, momentarily take off his thick dark rimmed glasses,and announce: "From Dallas,Texas,the flash, apparently official, President Kennedy died at one p.m.

VOA: special.2009.08.16

Around back, the Lumia 720's rear camera module is housed neatly in that familiar metallic strip, which also plays host to the Carl Zeiss branding, with the flash off to the left.

ENGADGET: Nokia Lumia 720 preview: a slim and 'trendy' Windows Phone 8 handset for the social networking set (update: video)

"I was scared to death when a bright flash went off, " wrote one female user.

BBC: Russia meteor eyewitness: 'Something like the sun fell'

When the flash goes off, Mandela closes his eyes.

CNN: SHARE THIS