Suddenly thought of a very serious problem, because never reflect on before, so when this problem in mind, flash-off time, we stubbornly believe that very serious.

忽然想到一个很严重的问题，因为从来不曾细想过，所以当这个问题在脑海里一闪而过的时候，便固执地认为相当严重。

youdao

Stopping to rest, Pete shut off the flash.

停下来休息的时候，皮特关掉了手电筒。

《柯林斯英汉双解大词典》

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

Mike Hussey and Brad Haddin, together at the resumption, have produced some impressive stands thus far in the series - but were parted in the fourth over when a flat-footed flash outside off stump by Haddin gave James Anderson his first wicket of the match.

BBC: Ashes: Alastair Cook builds England reply in Sydney

Dane Elec, of course, sells additional keys, but you can also use most off-the-shelf USB flash drives.

ENGADGET: Switched On: MyDitto NAS has some key issues

These drives are based on flash memory - which stores data even after its device is turned off - and are about the size of a large cigarette lighter.

CNN: Mobile PCs can be risky on the road