Over the years, scientists have come up with a lot of ideas about why we sleep.
关于我们为什么要睡觉,多年来,科学家提出了很多想法。
Some have argued that it’s a way to save energy. Others have suggested that slumber provides an opportunity to clear away the brain’s cellular waste. Still others have proposed that sleep simply forces animals to lie still, letting them hide from predators.
有些人认为这是一种节约能量的方法。其他人提出,睡眠为大脑提供了清除细胞废物的机会。还有一些人认为,睡眠只是迫使动物静静地躺下来,让它们可以躲过捕食者。
A pair of papers published on Thursday in the journal Science offer evidence for another notion: We sleep to forget some of the things we learn each day.
周四在《科学》(Science)期刊上发表的两篇论文为另一个观念提供了证据:我们睡觉是为了忘记每天所学到的一些东西。
In order to learn, we have to grow connections, or synapses, between the neurons in our brains. These connections enable neurons to send signals to one another quickly and efficiently. We store new memories in these networks.
为了学习,我们必须增加大脑神经元之间的连接,或者叫突触。这些连接使神经元能够快速有效地在彼此之间发送信号。我们就是在这些网络之中存储新的记忆。
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