English-Chinese/Sleep is divided into two broad types: non-rapid eye movement (non-REM or NREM) sleep and rapid eye movement (REM) sleep
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Sleep is divided into two broad types: non-rapid eye movement (non-REM or NREM) sleep and rapid eye movement (REM) sleep. Non-REM and REM sleep are so different that physiologists identify them as distinct behavioral states.
睡眠分为两大类：非快速眼动（非REM或NREM）睡眠和快速眼动（REM）睡眠。 非REM和REM睡眠是如此不同，以至于生理学家将它们识别为不同的行为状态。