If you are looking up at the sky on a clear night and you see a sudden flash of light, it is probably a shooting star!

如果你在晴朗的夜晚仰望天空，突然看到一道闪光，那可能是颗流星！

youdao

Trees do more than keep the soil in place. They also soak up water and prevent flash floods, and keep rivers clear of sediment that can kill fish.

树木所起的作用不止于保持水土。树木还吸收水份、防止洪水突发，并使河流不至于含有可杀死鱼类的泥沙沉淀。

youdao

If you have been able to relax, partially or completely, you will have a flash of improved or clear vision, and the area seen best will be smaller.

如果你已经得到休息，部分或者完全，你会有一个瞬间的得到改善的，或者清晰的视力，并且你能看得最清的范围将会更小。

youdao

We plan on at least one more blog on flash based storage this week but it is clear that both HDDs and flash memory are making advances that will allow them to storage and service our developing needs for commercial and personal content.

FORBES: Digital Storage, Our Only Hope

In a flash the foil was clean, and a clear mist hung in the air without any burning taking place.

FORBES: Puff Daddy

Using advanced floating lens technology, the camera in the Lumia 920 is able to take in five times more light than typical smartphones without using flash, making it possible to capture clear, bright pictures and video indoors and at night.

ENGADGET: Nokia Lumia 920 and 820 land stateside on AT&T's 4G LTE network this November