有没有发现在晚上十点的时候你特别困，随后这股困劲过去了，在晚间新闻开始的时候你又一点都不想睡了？
Ever find that you get really sleepy at 10 p.m., that the sleepiness passes, and that by the time the late news comes on, you're wide-awake?
有没有发现在晚上十点的时候你特别困，随后这股困劲过去了，在晚间新闻开始的时候你又一点都不想睡了？
Ever find that you get really sleepy at 10 p. m. , that the sleepiness passes, and that by the time the late news comes on, you're wide-awake?
有没有发现在晚上十点的时候你特别困，随后这股困劲过去了，在晚间新闻开始的时候你又一点都不想睡了？一些专家认为困意具有周期性。
Ever find that you get really sleepy at 10 p. m., that the sleepiness passes, and that by the time the late news comes on, you're wide-awake? Some experts believe sleepiness comes in cycles.
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