目的：取消异相睡眠后大鼠游泳速度的变化，为运动训练提供一定的科学方法。
AIM: To observe the changes of the swimming velocity of rats after paradoxical sleep deprivation(PSD), so as to provide certain scientific methods for exercise training.
不同的人对睡眠的需要差异相当大。
The need for sleep varies considerably from person to person.
不同的人对睡眠的需要差异相当大。
The need for sleep varies considerably from person to person.
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