Numerous studies have shown that lack of sleep hurts-it can lead to weight gain, diseases, and of course weakened cognitive functioning.

许多研究表明睡眠缺乏对人有害——它能导致体重增加、生病，当然还能导致认知能力减退。

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Numerous studies have shown that lack of sleep hurts-it can lead to weight gain, diseases, and of course weakened cognitive functioning.

许多研究表明睡眠缺乏对人有害——它能导致体重增加、生病，当然还能导致认知能力减退。

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