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Then REM sleep emerges, rapid eye movement sleep.

这时就进入REM快速眼动睡眠。

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And don't wake up earlier than usual to study; this could interfere with the rapid-eye-movement sleep that aids memory, he says.

不要比平常更早起床学习，这么做会妨碍有助记忆的快速眼动睡眠。

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Then REM sleep emerges, rapid eye movement sleep.

这时就进入REM快速眼动睡眠。

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The sleep test also was normal, except for a delayed onset of rapid-eye-movement sleep, with unknown medical significance.

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Wearable fitness devices are the current technology fad, with startups such as Jawbone and Fitbit, as well as larger companies like Nike and soon, reportedly, Apple, jumping in with devices to measure things like body movement and sleep.

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Alcohol reduces how much time we spend in rapid eye movement (REM) sleep - the stage of sleep where dreams generally occur.

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