Hedgehogs and bears may have fewer brain cells than us, but they know a thing or two about recuperation. In the northern hemisphere, they find a good place to curl up and conk out. Then they bounce back as soon as they wake up from hibernation, according to the biologists who are studying them with the hope of inducing a similar state in astronauts on long space missions.
刺猬和熊的脑细胞也许不如人类多，但它们对如何恢复元气却颇有心得。在北半球，它们会找个合适的地方蜷缩入睡。根据研究它们的生物学家所言，一旦从冬眠中醒来，它们便能迅速恢复活力——这些科学家正希望能把类似的状态应用到执行长期太空任务的宇航员身上。
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