Research suggests that babies learn to see by distinguishing between areas of light and dark.

研究显示婴儿是通过区分明亮区域和黑暗区域来学会观看的。

《柯林斯英汉双解大词典》

Photoreceptors are cells that respond to light by sending out a chemical signal.

光感受器是通过发出化学信号来对光作出反应的细胞。

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To demonstrate their approach, they added the genes to a bacterium and found that a flask of the bacterial culture produced enough light to read a book by.

为了展示他们的方法，他们给一种细菌添加了这种基因，并发现培养细菌的烧瓶中放出的光足可以在旁边看书。

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At the top of rocks was a man, his body was almost hidden by the storm clouds that hung low over the light house.

VOA: special.2010.05.08

We know that UV light gets absorbed by glass, so it shouldn't be able to go through the glass.

我们知道紫外光会被玻璃吸收，所以它无法通过玻璃。

麻省理工公开课 - 化学原理课程节选

And the relationship that he put forth is that the momentum is equal to Planck's constant times nu divided by the speed of light, or it's often more useful for us to think about it in terms of wavelength.

爱因斯坦提出的关系式是,动量等于普朗克常数,乘以υ除以光速，或者用波长来表示,通常更容易让我们想明白。

麻省理工公开课 - 化学原理课程节选

We're not rushing to beat that light, we're not stressed out waiting in a queue that's caused purely and simply by that red light.

BBC: Viewpoint: Is it time to get rid of traffic lights?

In fact, the star is so luminous that researchers will be able to make direct observations of the planet's atmosphere by examining light that shines through it when the star passes within KELT North's field of view again in November.

MSN: Newly discovered alien planet 'resets the bar for weird'

At the end of a short hallway was another door, indicated to me now by the light that came on behind it.

NEWYORKER: Wakefield