Even a fifteen-minute burst of light in otherwise sustained darkness can reset an animal's circadian rhythm.

即使是15分钟的猝发光（其它地方是持续的黑暗环境）也可以使动物重新设定生理节奏。

youdao

Beyond the light of the fire everything was swallowed up in the blackness of darkness.

除火光之外，一切都被黑暗吞没了。

youdao

Darkness is in reality the absence of light. Light we can study, but not darkness.

黑暗其实是因为缺少光的缘故，我们可以研究光线，但无法研究黑暗。

youdao

She used her skill in mixing darkness and light to create works of art.

VOA: special.2009.05.10

Together, these researchers have found a way to measure the amount of light pollution around using satellite data, thereby creating the world's first atlas of light and darkness.

ECONOMIST: Going, going, nearly gone

When the sun goes down, crossing the line between the City of Light and the City of Darkness is eerie, almost post-apocalyptic: moving within minutes from the bright lights of Times Square to the narrow unlit streets of the Financial District with the looming outlines of skyscrapers towering overhead.

BBC: Storm Sandy: New York's dark and bright sides

Many who observe this holiday will light the Diya, or lamp, which symbolizes the triumph of light over darkness and knowledge over ignorance.

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