Because the flash must survive multiple reflections without being absorbed or becoming too weak, not just any light can be used. It must be a laser.
因为闪光必须在反射若干次后不被吸收或者变得太弱，所以不是所有的光都可以用，必须是激光。
Fill flash is when you are outdoors for example and the light you are getting from the sun is the main light. Fill flash is just that.
现在来谈谈闪光灯补光，补光是指当你在户外，阳光是主要光源时，闪光灯用来照亮阳光给人物带来的阴影等影响(如兔眼等)。
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。
Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud.
闪电是一种因为暴风云放电而产生的一种明亮闪光。
When neutrinos interact with electrons or nuclei of those water or oil molecules, they give off a flash of light that sensors can detect.
当中微子与那些水分子或油分子的电子或原子核相互作用时，会发出传感器可以检测到的闪光。
And as a widely used tool, the flash light plays an important role in photography for its compensation on brightness.
闪光灯是一种用途非常广泛的辅助工具，用以弥补摄像光线不足，在摄影中有着不可或缺的作用。
The intent is to output just enough power from the flash to make the flash light falling on the main subject match or balance the ambient light falling on the background.
其目的，是使照在主体上的闪光灯输出光线恰与落在背景上的环境光线相均衡。
Light from the flash would be reflected off the door and onto both the person and the walls behind that person.
闪光会被门反射，接着会打在那个人以及人后面的墙上。
Even after these modifications, the camera's flash still dazzled with a burst of white light.
即使在经历了这些改进之后，照相机闪光灯依然能发出令人眼花的强烈白光。
The distance information from the lens and 3D matrix metering is then used in the computation to determine the amount of flash light to put out.
由镜头和3D测光系统得到的距离信息会用来计算闪光灯的输出功率。
The flash is aimed at the ceiling, wall or flash reflector, which disperses and softens the light, and bounces it back at the subject.
闪光时对准天花板，墙面或反光板，使得光线分散和柔化，并反射到被摄物上。
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。
Computer scientist Rob Fergus was sitting in a dimly lit Boston bar when a sudden burst of bright light blinded him-the camera flash accompanying a friend's photograph.
计算机科学家罗伯·费格斯当时正坐在波士顿一家灯光昏暗的酒吧里，突然一阵强光闪耀，照得他眼前发黑——原来是一个朋友拍照时照相机闪关灯发出的光。
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！
They wait for the flash of light that signals the rare occasion when a neutrino hits an ice molecule.
当一个中微子罕见地撞到一个冰分子时，探测器们等待的就是这一瞬间的闪光。
He and his lawyer walked out of the court, dashing out of the tight encirclement of reporters and flash light, then ducked into the car.
他和律师走出法院，冲出记者和闪光灯的重围，一头钻进汽车。
In the new study, the physicists shot xenon atoms with FLASH, an X-ray laser that USES intense photons in the extreme ultraviolet energy range, about forty times the energy of visible light.
在这个新的研究中，物理学家们用一种处在极紫外能量范围的强光子X射线激光器发出的闪光照射氙原子，所用闪光的能量是可见光能量的40倍。
Also take a picture without the flash, because the soft light of overcast days sometimes gives quite pleasing results by itself. Move in close.
也可以不使用闪光灯拍摄照片，有时阴暗天气的柔光会产生令人愉悦的效果。
Have the photographer use natural light. Don't shoot in direct sunlight or with a flash. Consider sitting in the shade, outside on a sunny day. Pick a light, unobtrusive background.
叫摄影者用自然光。不要在直射的太阳光底下，也不要用闪光灯。可以考虑坐在室外晴天的阴凉处，选一个亮色不扎眼的背景。
That's why cameras use flashes in low-light environments: the flash gives the camera's sensors an extra dose of photons, the particles that make up light, Fergus says.
费格斯说，照相机在光线昏暗的情况下需要使用闪光灯的原因是：闪光给照相机传感器提供大量额外光子，光线正是由这种粒子组成的。
Machines are used where they're worth it: at another station, one tests the power output of finished cells with a flash of light before robotic arms place them into bins according to performance.
机器要用在更能发挥他们价值的地方：在另一个车间里，用一道光来检测成品电池的输出功率，然后依据检测结果使用机器手将他们放在箱子里。
Suddenly, with a blinding flash of light and a deafening roaring sound, the pumpkin grew, and grew and grew!
突然，伴着刺眼的光芒和震耳欲聋的声响，南瓜长啊，长啊，长啊！
When a particle encounters its antiparticle, they "annihilate" each other, disappearing in a high-energy flash of light.
当一个粒子遇到它的反物质的时候，他们会湮灭彼此，同时放出夺目的高能闪光。
NYU researchers create a camera flash that uses invisible illumination, blinding no one, but still taking high-quality pics in low-light situations.
纽约大学研究人员制造出了一种使用不可见光照明的相机闪光灯，不会让人觉得眼花，在光线暗的情况下依然拍出高质量的照片。
NYU researchers create a camera flash that USES invisible illumination, blinding no one, but still taking high-quality pics in low-light situations. Here is how it works.
纽约大学研究人员制造出了一种使用不可见光照明的相机闪光灯，不会让人觉得眼花，在光线暗的情况下依然拍出高质量的照片。以下是相机工作原理。
While we can't confirm the lucky-in-love part of this, there is a scientific explanation for the flash of green light.
然而虽然我们不能确信是否能在爱情中交到好运，但是这道绿光还是有科学上的解释的。
A glass bulb filled with finely shredded aluminum or magnesium foil that is ignited by electricity to produce a short-duration high-intensity light flash for taking photographs.
闪光泡一种内部装有铝箔或镁箔的精细碎片的玻璃灯泡，用电点燃以发出短暂的高强度闪光，从而拍摄照片。
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