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Passage 42
Sleep
Why is it so difficult to fall asleep when you are overtired? There is no one answer that applied1 to every individual. It is possible to feel “tired” physically2 and still be unable to fall asleep, because while your body may be exhausted3, you do not feel sleepy. It is not so easy to simply “turn off”.
Lack of sleep complicates4 matters even more. Experts say adults need at least seven to eight hours of sleep a night to function properly. When you get less sleep than that on consecutive5 three nights, you begin to accrue6 for “sleep debt”. As sleep debt increases your body experiences a stress response. Now a vicious cycle has been created: You experience the feeling of being more and more tired, but your body is increasingly stimulated7. “Power sleeping” for more hours on weekends is only a temporary solution. There is no substitute for getting a good night’s sleep on a regular basis. (158 words)
Sleep
Why is it so difficult to fall asleep when you are overtired? There is no one answer that applied1 to every individual. It is possible to feel “tired” physically2 and still be unable to fall asleep, because while your body may be exhausted3, you do not feel sleepy. It is not so easy to simply “turn off”.
Lack of sleep complicates4 matters even more. Experts say adults need at least seven to eight hours of sleep a night to function properly. When you get less sleep than that on consecutive5 three nights, you begin to accrue6 for “sleep debt”. As sleep debt increases your body experiences a stress response. Now a vicious cycle has been created: You experience the feeling of being more and more tired, but your body is increasingly stimulated7. “Power sleeping” for more hours on weekends is only a temporary solution. There is no substitute for getting a good night’s sleep on a regular basis. (158 words)
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1 applied | |
adj.应用的;v.应用,适用 | |
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2 physically | |
adj.物质上,体格上,身体上,按自然规律 | |
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3 exhausted | |
adj.极其疲惫的,精疲力尽的 | |
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4 complicates | |
使复杂化( complicate的第三人称单数 ) | |
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5 consecutive | |
adj.连续的,联贯的,始终一贯的 | |
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6 accrue | |
v.(利息等)增大,增多 | |
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7 stimulated | |
a.刺激的 | |
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