失眠（insomnia）是指睡眠的始发（sleep onset）和睡眠维持（sleep maintenance）发生障碍,致使睡眠质量不能满足个体生理需要而明显影响患者白天活动（如白天困倦乏力、记忆力注意力下降等）的一种睡眠障碍综合征...
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Actually the elderly are more prone to sleep maintenance problems whereas younger people tend to have trouble falling asleep.
事实上，老年人更容易在睡眠维持方面出问题，而年轻人则往往是难以入睡。
The study will measure reduction in time to onset of persistent sleep and sleep maintenance across a range of doses and formulations during two weeks of treatment.
该项研究的疗程为2周，主要考察不同剂量和处方对入睡潜伏期的缩短作用和睡眠时间的持续作用。
The connection has existed for three minutes, which is less than Aged timeout, so the pool maintenance thread leaves it alone and goes back to sleep.
该连接已存在三分钟，这小于过时超时时间，这样池维护线程将保留该连接，并回到睡眠状态。
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