Usually, you must sleep for at least seven to eight hours every day, or you will get dark circles under the eyes.

通常，你必须每天至少睡7-8小时，否则你会有黑眼圈。

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But there's evidence to suggest that chocolate is less fattening when eaten at the start of a dark, depressing day such as Blue Monday.

但有数据显示，在像“黑色星期一”这样沉闷的一天的天色刚开始暗的时候吃巧克比较不会发胖。

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The bats are balancing the need to wait until dark, when day-flying hawks stop hunting, and the need to catch the insects when they are most plentiful, right at dusk.

弗里克指出，蝙蝠在平衡两种需求，一种是等待夜幕的降临，为了躲避那些白天捕食的鹰；另一种是捕捉昆虫的需求，它们往往在傍晚很丰富。

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As he tells it,one day he looked in the window of a school and noticed how dark it was.

VOA: special.2009.12.21

Milton has his hero, Samson, bewailing the fact of his blindness: "O dark, dark, dark, amid the blaze of noon irrecoverably dark, total eclipse without all hope of day!"

弥尔顿描写到自己崇拜的英雄参孙悲叹自己失明：,黑暗，黑暗，黑暗，在正午的光辉中,无法改变的黑暗，黯然的没有一点希望“

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The lettering will appear dark during the day, and by night will glow, with lighting hidden below the panels.

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"The Nordic countries get dark earlier in the day, and everyone has candles lit in the windows, " Jensen says.

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In fact, if the market stays depressed for the next several years as you continue to save, this dark day in the market will likely be a financial blessing.

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