The brain activity data collected from the volunteers in the sleep group showed that deep sleep (slow-wave sleep) helped strengthen their memories of new words.

从睡觉的那一组志愿者那里收集来的大脑活动的数据表明，深度睡眠(短波睡眠)帮助他们巩固了对词汇的记忆。

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Deep sleep is associated with slow brain waves, and larks spent 50% more time in such slow-wave sleep than owls did.

睡眠之深与否与慢波有关，而百灵鸟型处于慢波睡眠的时间比夜猫子型多50%甚至更多。

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In between cycles of REM sleep, we have non-REM sleep, which includes deep or 'slow-wave' sleep.

在快速眼动睡眠周期之间，我们还有非快速眼动睡眠，包括深度睡眠和慢波期睡眠。

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That drug appears similar to Ambien, Estorra and indiplon, but it also increases the deep slow wave of sleep.

FORBES: Sleep On Demand

Their study shows that as young people grow older they spend less of their sleeping time in slow wave or deep sleep.

BBC: Sleep linked to ageing

First the team showed that they could use the state of a region of the brain, called the medial prefronal cortex, to predict how much deep, or slow-wave, sleep a person would have.

BBC: Boosting sleep 'may slow memory rot'