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Why do babies fall asleep when they're rocked? All parents know it works, and have their own special way of moving with an irritable sleepy baby - in a sling, up and down, side to side, in the car. Recent research on rocking doesn't answer the baby question, but shines a light on the salutary effect it can have on grown-ups. 为什么摇着摇着，宝宝就睡着了？父母都知道这招管用，也有一套独特的方式摇晃焦躁困倦的宝宝--用背巾背着，上下摇晃、从一边晃到另一半，在车上。近来关于摇晃的研究并没有解决宝宝的问题，但可能对成年人带来有益影响。 Anyone who's experienced sleeping on a boat will wax lyrical about it - the special soothing sensation of being rocked to sleep by gently lapping water. There's even a company that specializes in offering floating accommodations. And novelists from Graham Greene to Paul Theroux have encapsulated the romance of the night train - boarding at bedtime, swaying in your berth with a clickety-clack lullaby, waking refreshed and ready to explore the completely different place you are now in. There is obviously something to be said for moving gently while sleeping. 任何在船上睡过觉的人都会对其热情吹捧--船儿轻轻拍打水面带来一种舒缓的入睡感。甚至有公司专门提供浮动住宿服务。格雷厄姆·格林（Graham Greene）和保罗·塞鲁克斯（Paul Theroux）等小说家们已将夜间列车的浪漫故事融入了摇摇晃晃的摇篮曲--睡前登船、躺在卧铺上摇晃，第二天醒来精神焕发，准备探索这一截然不同的所处地。显然，睡觉时的轻微晃动是有益的。 | 
