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- Habit is hereditary with plants, as in the period of flowering, in the time of sleep. 植物习性是遗传的，例如开花的时期，休眠的时间。
- It is well established that following an acute period of sleep loss, the body responds this way in order to maintain a homeostatic balance between sleep and wakefulness. 目前我们确定短期熬夜后，机体会以补充睡眠的方法保持睡眠与清醒间的自我平衡。
- A growing child needs plenty of sleep. 正发育的孩子必须睡眠充足。
- Lack of sleep is detrimental to one's health. 缺乏睡眠有害健康。
- Results:Sanweishuyu recipe could significantly reject the reserpine-induced symptoms of depression,reduce the latent period of falling asleep and prolong the sustained period of sleep in mice(P<0.05 or P<0.01). 并有一定的减少入睡时间;延长睡眠时间的作用(P<0.;05或P<0
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- He had a snatch of sleep sitting in his chair. 他坐在椅子里稍睡片刻。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- I had nine blissful hours of sleep. 我无忧无虑地酣睡了九个小时。
- His eyes were bloodshot from lack of sleep. 他因缺少睡眠而两眼通红。
- Which period of history are you studying? 你正在学哪一段历史？
- It is conceivable that animals who are too stupid to be quiet on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. 可以想像得出，在危险的时刻，那些由于太愚笨而不能自动保持安静的动物，会不由自主地变得动弹不得。
- This was the most difficult period of his life. 这是他一生中最艰难的时期。
- A condition, time, or period of flowering. 花期一种开花的状态、一段开花的时间或时期
- Most people need six to eight hours of sleep every day. 多数人每天需要六至八小时的睡眠。
- It is conceivable that animals who are too stupid to be quite on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. 可以想象，具备主动性的动物，如果处于高风险中，仍然可以沉睡，未免就太傻了。
- The capital cost is amortizable over a period of ten years. 资本费用可在十年之内分期偿还。
- His way of sleeping makes me cringe. 他睡觉的方式令我生厌。
- The new government ushered in a period of prosperity. 新政府的成立带来了一个繁荣的时期。
- One of the difficulties attendant on shift work is lack of sleep. 轮班工作制带来的困难之一是睡眠不足。
