It is very difficult to awaken a person in deep sleep, and children in this state may be nearly impossible to wake up.
处在深睡眠状态的人极难被唤醒，如果是儿童进入这种状态，唤醒他们几乎是不可能的任务。
Whether or not most of us are aware of the state of deep sleep, it functions to restore us physically and mentally.
无论我们对深睡眠状态了解多少，它都在帮助我们恢复体力和精力。
Characteristic brain waves on the electroencephalogram, quite different from those recorded in deep sleep and very similar to those recorded in the waking state.
脑电图上特有的脑电波，与酣睡中记录下来的脑电波完全不同，而与醒着时记录下来的脑电波很相似。
I was working almost every day for five months, and every bit of sleep I was in such a deep state of 16 unconsciousness that I couldn't recall anything.
五个月来我几乎每天都在工作，每次一睡着都是沉睡状态，我什么都想不起来了。
I was working almost every day for five months, and every bit of sleep I was in such a deep state of 16 unconsciousness that I couldn't recall anything.
五个月来我几乎每天都在工作，每次一睡着都是沉睡状态，我什么都想不起来了。
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