We don't think about that as often as we think about light pollution.
我们不像思考光污染那样经常思考这个问题。
Talking about light, light is essential.
光，是非常必要的。
光是怎样的？
A good way to think about light is to pretend that it's water.
一个很好的方法是把光想成水。
Classic scientific ideas about light were changed by Einstein.
爱因斯坦改变了对于光的古典科学观念。
Classical scientific ideas about light were changed by Einstein.
爱因斯坦改变了科学上关于光的传统观念。
Today, I'm going to talk about light, and in particular about laser beams.
今天，我要谈一谈光，特别是镭射光。
Einstein's new theory on optics changed classical scientific ideas about light.
爱因斯坦新的光学理论改变了人们对光的传统科学概念。
This paper puts forward a new method about light-guiding fiber diameter-measuring system.
文中提出光导纤维直径测量系统的新方法。
If I have a chance to meet him, I would like to have a heart-to-heart with him about light. I always miss him.
我总是在怀缅他，多希望可以再有一次机会，跟他掏心窝地谈论光。
My intention was to slay a dragon, one of my own making, and conquer one of my own phobias about light and digital photography.
为了克服我对光线和数码摄影的恐惧，我就不信这个邪！
This one's about this photographer's vision, about light, about the sense of texture a picture can give you just by looking at it.
仅仅是看着这张照片，它可以体现出拍照者的视野，光线，协和统一的美感。
In the first case it means light as a feather, weight wise and in the second case we're talking about light as opposed to dark. So that's the fallacy of equivocation.
第一句中是指羽毛很轻，在重量方面的，第二句是，与黑相对的亮，这就是模糊谬论。
It is Lilliya's goal to bring more information about light wave movements and fusion based ascension to consciousness for those who are ascending at this time in history.
这是Lilliya的目标，来将更多有关光波运动和基于融合的提升的信息，为那些在历史此刻提升的人们带入到意识中。
Make sure to incorporate everything that you've learned about light, detail, and photographic technique, to make sure that nothing technical interrupts the power of the image.
要确切地融会贯通你曾学过的光线、细部及影像处理技法，并留意不要让技术问题阻隔了影像的力量。
I had to feel about in the dark for the light switch.
我得在黑暗中摸索寻找电灯开关。
A joke, a compliment, an engaging discussion about the latest film or book – these things add a little light to the lives of those around you.
一个笑话、一场赞美、一场关于最新电影或书籍的热烈讨论——这些东西在你周围的这些生命上增添一丝光亮。
Then she read about seasonal affective disorder, a form of depression that occurs in fall and winter, and she saw the light—literally.
然后她读了关于季节性情感障碍的书，这是一种发生在秋天和冬天的抑郁症；而她真的看到了光。
You are right of course about the intense light associated with his daytime paintings.
当然，你是对的——强烈的光线与他白天的绘画有关。
Ripley's thesis about sports falls apart in light of this fact.
由于这一事实，雷普利这篇关于体育的论文就站不住脚了。
The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.
第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。
The nearest star to earth is about 4 light years away.
地球离最近的恒星大约为4光年。
It gets light at about 5 o'clock.
大约5点钟天就亮了。
There was something strange about the flickering blue light.
那闪烁的蓝光有点儿奇怪。
The plane was flying normally for about 15 minutes before a warning light blinked on.
飞机正常飞行15分钟后警示灯开始闪烁。
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