Bats have an engineering problem: how to find their way and find their prey in the absence of light.
蝙蝠们遇到了一个技术上的难题：如何在没有光线的条件下认路和捕食。
Photographer Andy Hemingway has released a photo series of light painting in an abandoned parking garage in Houston, TX.
摄影师安迪·海明威发布了他在德克萨斯州休斯顿的一个废弃车库中创作的光画影集。
What starts as an everyday squash turns into a lantern of light.
一个平平常常的南瓜变成了一个充满光亮的灯笼。
Redshift refers to what happens when light seen coming from an object is proportionally shifted to appear more red.
红移是指当一个天体发出的光线看起来成比例地更偏向红色。
A sensor channels the light signal along an optical fibre.
传感器沿光导纤维输送光信号。
Based on discrete diffraction light, an algorithm of holographic grating bandwidth compression is proposed.
提出一种基于离散衍射光的全息光栅的带宽压缩算法。
"Slytherin's mark," he said quietly, as the light played upon an ornate, serpentine s.
“斯莱特林的记号。”他轻声说，光中闪耀着一个华丽的、蛇形的S。
Just try reading small text in poor light, or flicking through an early issue of Wired.
只要试试在昏暗的光线下看很小的字，或浏览一本《连线》杂志的早期出版物便会发现这一点。
Finding the right book at the right time can light an emotional spark within us that motivates us to read more, understand more, and read joyfully.
在恰当的时间，阅读一本好书可以点燃思想的火花，让我们更加博闻强识，享受阅读。
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。
In this, he synthesized all his tricks from Drury Lane: mechanical motions, sound, light, other special effects to create, if you will, an early multimedia production.
在这部作品中，他综合了德鲁里巷中用到的所有技巧——包括机械运动、音效、灯光，以及其他特效，（可以说是）创作了一部早期的多媒体作品。
Obscuring dust lanes, young blue star clusters and reddish star forming regions surround a core of yellowish light from an older population of stars.
遮蔽尘带、年轻的蓝色恒星团和红色调的恒星形成区，包围着核心发出黄色光芒的老年恒星群体。
There is another class of lasers, however, that pulse, oscillating between an "on" stage, where light is produced, and an "off" stage, when the amount of light is dramatically reduced.
脉冲激光器是另一类的激光器，它的脉冲是在“开”与“关”两种状态的振荡之间产生。当激光器处于“开”的状态，产生光，在“关”的状态，光量显著减少。
The ambient reflection only reacts to ambient light; thus, using an omnidirectional light has no effect.
环境反射仅对环境光起作用，因此，使用全向光是无效的。
Because nothing can exceed the speed of light, an object cannot flicker faster than the time required for light to travel across the object.
因为没有物体的速度超过光速，所以物体的闪烁速度不可能快于光穿过该物体所用的时间。
The whole fixture must be replaced—light source and luminaire—and this is never an inexpensive proposition.
整个装置——光源和灯具——必须换掉，而这一提议绝不便宜。
The relationship between the amount of light an incandescent bulb can produce and how long it will last is complicated, to say the least.
退一步说，一盏白炽灯能产生的亮度与其照明寿命之间的关系很复杂。
When light from an object such as a machine part strikes the camera, the sensitive materials measure the intensity of light and convert the light rays into a range of numbers.
当一个物体上的光，如机器零件，照射到相机上时，敏感材料就可测量出光的强度，把光线转换为一组数字。
The Wizard of Menlo Park didn't invent the light bulb;he invented an industry.
才气超凡的门罗·帕克并没有发明灯泡，但是他创造了一个产业。
In the video, photographer Joe Edelman demonstrates the difference lighting makes, using only a single light source and an ordinary egg.
在视频中，摄影师JoeEdelman展示了不同的光线如何影响物体，所使用的不过是一个非常简单的光源和一枚普通的鸡蛋。
It is a demand we often neglect or resist, but every four years we are reminded with this opportunity to see anew, aided by the light of an Olympic flame.
我们常常会忽视或抵制这样的要求，但在奥林匹克之火照耀下，这样的机会每四年就有一次。
Ambient reflection: The light that is reflected by an ambient light source.
环境反射：由环境光源反射的光线。
He came from a town so small it didn't have a stop light, a building with an elevator or a movie theater.
他的老家是一个非常小的镇，那里连红绿灯都没有，没有一个楼里有电梯的，甚至连电影院都没有。
Bogs are also flooded with sunshine, so even an inefficient carnivorous plant can photosynthesise enough light to survive.
沼泽也充满阳光，所以即使是低效的食肉植物也能获得足够的光，依靠光合作用生存。
That novel rendering of light seemed an insult to them.
这种前所未有的对光线的描绘对他们来说好似侮辱。
Solar panels generate electricity by converting photons (packets of light energy) into an electric current.
太阳能电池板通过将光子(光的能量包)转化为电流来发电。
The researchers also tested the flies' saliva for enzymes that signal sleepiness and measured the flies' ability to associate a light with an unpleasant stimulus.
研究人员还检测了果蝇唾液中显示困倦程度的酶，还测试了果蝇将光亮与令人不快的刺激联系起来的能力。
A person with his back to a bright window will have light reflected from an opposite wall falling on him.
如果一个人站在明亮的窗户前，对面的墙壁会反射部分光线落在人身上。
The way the light falls on an object provides us with the shading that helps us see shapes in three dimensions.
光线照射在对象上的方式能够提供给我们阴影以帮助我们看到三维的形状。
Even invisibility now looks almost possible using a new type of material that can direct light to flow around an object as though it were not there.
甚至隐形现在也几乎成为可能：一种新型材料可以引导光线在物体四周流动，使得物体看起来就像不存在一样。
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