When We Are Asleep Everyone dreams, but some people never recall their dreams, or do so yeryrarely. Other people always wake up with yivid recollections (回忆),of theirdreams, though they forget them very quickly. In an average night of eight hours'sleep, an average adult will dream for around one hundred minutes, probablyhaving three to five dreams, each lasting from ten to thirty minutgs: atl episScientists can detect when someone is having a dream by using an instrumentwhich measures the electrical waves, in the brain. During dreaming, these, wayesmove more quickly. Breathing and pulse rate also ipgrease, and there are rapid eyemovements under the eye lids, just as though, the dreamer were really Jooking atsome moving objects. These signs of dreaming haye been detected in all mammalsstudied, including dogs, monkeys, cats, and elephants, and also some birds andreptiles(爬行动物),.This period of sleep is called the “D” state. Babies experiencethe "ID" state for around 50% of their sl
When We Are Asleep <br>Everyone dreams, but some people never recall their dreams, or do so yeryrarely. Other people always wake up with yivid recollections (回忆),of theirdreams, though they forget them very quickly. In an average night of eight hours'sleep, an average adult will dream for around one hundred minutes, probablyhaving three to five dreams, each lasting from ten to thirty minutgs: atl episScientists can detect when someone is having a dream by using an instrumentwhich measures the electrical waves, in the brain. During dreaming, these, wayes<br><br>move more quickly. Breathing and pulse rate also ipgrease, and there are rapid eyemovements under the eye lids, just as though, the dreamer were really Jooking atsome moving objects. These signs of dreaming haye been detected in all mammalsstudied, including dogs, monkeys, cats, and elephants, and also some birds andreptiles(爬行动物),.This period of sleep is called the “D” state. Babies experiencethe "ID" state for around 50% of their sl
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