And because we already had evolutionary pressure to sleep, the theory goes, the brain evolved to use that time wisely by processing information from the previous day: acquire by day; process by night.

既然因为我们已经有了睡眠的进化压力，进化理论说明，大脑就进化到明智使用睡眠时间来处理前一天获得的信息：白天获取，夜晚处理。

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Sleep researchers at the University of Wisconsin-Madison School of Medicine and Public Health believe it is more evidence for their theory of "synaptic homeostasis."

在威斯康星-麦迪逊学校药品和公共卫生部门，睡眠研究者们确信存在更多的证据来支撑他们的“突触静态平衡假说”理论。

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One theory about Sad is that sufferers do not get enough light in winter to halt melatonin production, and this disturbs their sleep and appetite.

有关Sad的某一理论认为，患者在冬季未能得到足够的光照从而停止褪黑激素的分泌，这扰乱了他们的睡眠和食欲。

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