换句话说，就是人脑能同时处于睡眠和觉醒。
In other words, the human brain can be awake and asleep at the same time.
看起来视网膜中这些特化的细胞能够检测到光线，然后把光信息传送到大脑中调节睡眠和觉醒水平的区域。
It seems that these specialised cells in the retina detect light and send brightness information to those regions of the brain that regulate sleep and levels of arousal.
另外，意大利病人的例子佐证了一个近年来呼声渐高的观念：觉醒和睡眠并不是那么泾渭分明的。
What’s more, the Italian cases lend support to an idea that has been gathering steam in recent years: that wakefulness and sleep are not mutually exclusive.
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