下一个阶段又称为快速眼动睡眠阶段，我们的呼吸开始加快，眼球也开始快速跳动，但我们的身体却保持不动。
In the next stage—REM sleep—we begin to breathe faster and our eyes move around quickly, but our bodies do not move.
他们发现，脑干中的某些细胞只在快速眼动睡眠阶段才产生电化学信号。
They found that some cells in the brain stem produce electrochemical signals only during REM sleep.
生动逼真的、情绪的以及常常不可思议的梦是快速眼动睡眠阶段的特点，快速眼动睡眠占据了我们睡眠的20%时间。
Vivid, emotional and often very weird dreams are typical of REM (rapid eye movement) sleep, which makes up about 20 per cent of our sleep.
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