WHEN companies want to emphasise a turnaround in their prospects they paint the past in a dark light so that the future can only appear brighter.

当公司想强调经营有望好转时，就将过去描述成一片黑暗，这样未来就不管怎样都是更加光明的。

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It was getting dark so I switched on the light and drew the curtains.

天快黑了，我打开灯，拉上了窗帘。

《牛津词典》

The use of light and dark symbolizes good and evil.

用光明与黑暗来象征善与恶。

《牛津词典》

In "Family of Man," a dark-haired, light-eyed woman with a bright blue head covering looks intensely at something hidden from view.

VOA: special.2009.11.20

First,they don't meet in the daytime; they meet either early before light,at dawn, or after dark,at night.

首先，他们不在白天聚会;,要么在天亮前的黎明，要么在天黑后的夜晚。

耶鲁公开课 - 新约课程节选

That's because it's here where the rigid polarities between light and dark and good and evil, all of these absolute oppositions, begin to collapse.

这是因为这里就是光与暗,善与恶之间严格的两极分化，及所有绝对的对比开始崩塌的地方。

耶鲁公开课 - 弥尔顿课程节选

Bands of dark and light along the tail can be seen in the fossils.

BBC: Dinosaur had ginger feathers

By focusing on the edges separating dark from light areas, the researchers classified their dozen cities into three types.

ECONOMIST: Urban geography

It can be salty or sweet, mild or rich, dark or light.

NPR: Mastering Miso's Mysteries