当你的手电筒不能发出足够亮的光时，你该怎么办呢？
When your flashlight stops making enough light, what do you do with it?
这就好像当没有热量时寒冷就会来临，当没有光时黑暗就会来临。
It's like the cold that comes when there is no heat or the darkness that comes when there is no light.
暴露于自然光时，人体的昼夜节律每天都会重设。研究人员人为制造的封闭环境有助于判断志愿者自身的昼夜节律。
This environment allows the researchers to measure the natural circadian rhythms of the individuals, which are normally reset daily by exposure to natural light.
现在天文学家知道了该往哪寻找X星系，他们应该能找到，特别是当他们使用能贯穿尘埃的红外光时，Chakrabarti说道。
Now that astronomers know where to look for Galaxy x, they should be able to find it, especially if they conduct the search in dust-penetrating infrared light, Chakrabarti said.
引力透镜的工作原理如下：较近的大型物体如星系挡住一个远处的物体，如另一个星系时，光可以从阻挡物的旁边绕过来。
Gravitational lensing works like this: When a large nearby object like a galaxy blocks a distant object, such as another galaxy, the light can detour around the blockage.
新钞增加了新的特征，如晃动钞票时颜色会改变的全息图案，迎光可见的纵向水印条。
The new notes incorporated additional features, such as holograms that change color when the note is tilted, and vertical watermark bars that become visible when the note is held into light.
光，这种毫无疑问沿直线行进的东西也会在经过一个如星系的大质量物体时被弯折而走一条弯曲路线。
Light, which normally and famously travels in straight lines, thus appears to follow a curved path when it passes near a heavy thing such as a galaxy.
当天文学家用这种方法从地球上观测到一颗恒星在另一颗恒星前“走过”时，距地球较近的这颗恒星的重力就如同一个镜头，将较远的那颗恒星的光弯曲并放大。
In this method, when one star passes in front of another, as seen from Earth, the nearer star's gravity ACTS like a lens, bending and magnifying the more distant star's light.
当天黑时，我们可能会在没有光的情况下撞到东西。
When it's dark, we may bump into things without the help of light.
他还说，这些使用寿命高达大约10000小时的OLEDs将会是高效率的，且有能力创造出与自然光相类似的光谱。
They will, he adds, be efficient and capable of producing a spectrum of light similar to natural daylight with an operating life of around 10,000 hours.
他还说，这些使用寿命高达大约10000小时的OLEDs将会是高效率的，且有能力创造出与自然光相类似的光谱。
They will, he adds, be efficient and capable of producing a spectrum of light similar to natural daylight with an operating life of around 10, 000 hours.
在设置时钟时，光起着主导作用。
第一次世界大战开始时，她离开了塞维尼大学去帮助她的母亲，她的母亲当时正在使用x光设备来帮助拯救受伤士兵的生命。
When World War I began, she left Sevigne University to help her mother, who was using X-ray facilities to help save the lives of wounded soldiers.
当我靠得更近去看那些光团时，我突然意识到它们看起来就像一个个星系。
As I looked more closely at the tiny areas of light, I suddenly realized they looked like galaxies.
最近在博物馆的温室工作时，我看到一对珠光凤蝶在跳求爱舞蹈。
Working at the museum greenhouse recently, I saw a pair of birdwing butterflies engaged in a courtship dance.
太阳能电池（或称光伏电池）由硅制成，受阳光照射时产生电流。
Solar or photovoltaic cells, made of silicon, produce an electrical current when exposed to sunlight.
当你有了一个观点时，别光指望别人，在下结论前好好检查一下信息来源和细微差别之处。
Do not just rely on others while you form an opinion. Check several sources and nuances before drawing your conclusions.
思考这种种可能性时他激动得两眼冒光。
王的脸光，使人有生命。王的恩典，好像春云时雨。
In the light of the king's countenance is life; and his favour is as a cloud of the latter rain.
这两位明星最初在拍摄电影时所获的报酬相较而言少得可怜，不过他们对于暮光系列电影已变得不可或缺。
Both stars were paid relatively little for their initial work on the films but they have become indispensable to the Twilight franchise.
在纽约时代广场，作为迎接新年的传统仪式，五光十色的水晶球于零点时分准时降落，欢呼声与碎花纸在广场交相辉映。
Cheers and confetti filled New York's Times Square when the traditional midnight drop of a multi-colored crystal ball signaled the start of 2010.
在这个位于利伯罗瑟的德国最大的光伏发电场，太阳能电池板所发出的电能在峰值时能够满足一座小城的需求。
Solar cells here at Lieberose, Germany's biggest photovoltaic plant, produce enough electricity (at peak output) to power a small town.
当你承认自己的痛苦，自己的恐惧时，以怜悯心而不是批判迎接它，然后你给了自己一条回到光的道路。
When you acknowledge your own suffering, your own fear, and greet it with compassion instead of judgment, then you offer yourself a pathway back to the light.
最遥远的爆炸光飞向地球时，被宇宙的膨胀拉长而呈红色——一种被称作红移的现象。
As light from the most distant explosions travels toward Earth, it is stretched by the universe's expansion so that it appears red, a phenomenon known as redshift.
太阳活动的周期是11年。新数据表明，在一个周期末期太阳活动趋弱时，抵达地球的光与热的量增加而不是减少了。
As solar activity waned at the end of one of the Sun's 11-year cycles, the new data shows the amount of light and heat reaching the Earth rose rather than fell.
虹膜的工作机理如同照相机的光圈。天气晴朗时，虹膜将会变小以限制通光量。
The iris works just like the iris on a camera; if it's a bright day, and lots of light tries to enter the eye, then the iris will close down limiting the amount of light that can enter.
他们利用了这样的一个事实：当光从一个介质进入到另一个介质时，会发生弯曲，或折射。
They took advantage of the fact that light bends, or refracts, when it moves from one medium to another.
美国联邦调查局发言人在一份声明中说，在机场安检处进行X 光安检时，该可疑物品就在他随身携带的行李中。
The item was in his carry-on during X-ray screening at a security checkpoint at the airport, an FBI spokesman said in a statement.
美国联邦调查局发言人在一份声明中说，在机场安检处进行X 光安检时，该可疑物品就在他随身携带的行李中。
The item was in his carry-on during X-ray screening at a security checkpoint at the airport, an FBI spokesman said in a statement.
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