研讨标明80%的青年人都会长粉刺。

Studies show that almost 80 percent of teens will get acne.

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对果蝇的最新研讨标明，饥饿能让短少睡眠的头脑坚持清醒。

A new study involving fruit flies suggests the sleep-deprived mind is kept alert by hunger.

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研讨标明，当人们无事可做的时分，就会感到不高兴，担忧和孤单。

Researches show that people feel unhappy, worried and lonely when they have nothing to do.

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