She was in a perpetual state of heightened arousal, hence the pacing, moaning, and inability to sleep.

她始终处于一种高度警醒的状态，因此她一直在踱步，悲泣，而无法入睡。

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When the dreaming state of REM sleep was discovered in 1951, it was described as a "new continent in the brain" [source: Schaffer].

当1951年快速眼动睡眠状态被发现的时候，它被描述成“大脑的新大陆”【来源：谢弗】。

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When dolphins sleep, they sleep in a semi-alert state by resting one side of their brain at a time.

当海豚睡觉时，它们处于半惊醒状态，每次只休息大脑的一半。

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Dr Paul Goldwater, from the Women and Children's Hospital in North Adelaide, said that a recent rise in cot deaths in the state of Victoria - despite the "back to sleep" advice - raised question marks over its true role in the fall in sudden infant death.

BBC: NEWS | Health | Infant death 'doubts' challenged

It started at 4:45 a.m. when the sound of a dying seal permeated my dreams, and I was still in a semi-sleep state when I realized the mortally wounded seal was in fact my six-year-old son, lying on the floor by my bed, unable to draw breath.

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