高光能平衡阴影，应该位于物体靠近光源的边缘。

Highlights can help balance shadows and should be used on the edges of objects closest to the light source.

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全球大约有16亿人生活在没有电力只能依赖矿物燃料光源的环境中。

About 1.6 billion people worldwide are without access to electricity and have to rely on fuel-based sources for lighting.

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所以除非光源的色温非常极端，否则白纸在我们眼中看起来就是白的。

So unless the temperature of the light is very extreme a white sheet of paper will generally look white to us.

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So that means we're going to need to figure out what is the energy per photon that's emitted by that UV light.

所以那意味着我们将需要,计算出从紫外光源发射出的,每个光子的能量。

麻省理工公开课 - 化学原理课程节选

It'll still likely get stuck in that spot, but we'll just show you one more time the effects of the UV light, and actually we'll throw in an extra trick here, too.

它仍然像是在那点卡住了，但是我们还是会再展示一次,紫外光源的效应，事实上，我们也会引入一个新的技巧。

麻省理工公开课 - 化学原理课程节选

Intensity, if we increase the intensity, we're not increasing the energy in each photon, we're just increasing the number of photons that we're shooting out of our laser, whatever our light source is.

强度，如果我们增加强度，我们增加的不是,每个光子的能量，我们增加的仅仅是,从我们激光源射出的光子数，无论我们的光源是什么。

麻省理工公开课 - 化学原理课程节选