Meanwhile, participants in the other group spent a normal night at home with no sleep restrictions.

而同时，另一组受试者则在家里度过了普通的没有任何睡眠限制的一晚。

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On a normal night, you likely wash your face and slather on moisturizer. But a little indulgence will go a long way. Treat your skin to a hydrating mask.

在平日晚上，你可能洗脸并用保湿剂。但是，稍微奢侈一点将大有帮助。在脸上用保湿面膜。

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Even if it's far away I still get home before I'd go to bed on a normal work night.

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With the help of Chiara Cirelli, who also works at the University of Wisconsin, Dr Tononi has created a mutant fruit fly that sleeps only two or three hours a night. (A normal fly sleeps between eight and 14 hours.) The mutation itself is in a gene for a nerve-cell protein of a type known as an ion channel.

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Timothy Warmen, the understudy playing him that night, would have chewed all the scenery in a normal production.

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