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不知道你们是什么情况，双语君（微信ID：Chinadaily_Mobile）我是很嫉妒那些一沾枕头就能睡着的人。 不翻来覆去1小时、换上50个睡姿，是绝对不可能入睡的。 不过地铁公交上，要睡着却很简单。乘客的低语混杂着发动机的嗡鸣像是天然的白噪音，摇晃的车体又类似婴儿的摇篮，开车不一会儿，车上的人就东倒西歪的了。 在交通工具上更容易入睡，这是真的吗？ 网友PrionBacon评论认为，车上比床上更困倦是因为感觉输入在一段时间里是稳定重复的。 Much like a smartphone, your body will go to sleep when there are no new inputs. 其实就跟智能手机挺像的，身体没有新的外界输入的时候就会休眠。 When you are on a bus, your senses will give you the same repetitive inputs. The streets will flow by, the AC and engine adds constant white noise, you're seated and not moving, and the smell... well you hope the smell doesn't change. 坐公交的时候，你感知到的输入一直是重复的。街道飞驰而过，空调和引擎发出的白噪声，你坐着且并没有动，还有车上的味道……呃，你希望车上的味道最好不要变。 Any repetitive input going to your brain will eventually be ignored and your brain will start going into a low energy state. The fact that you fall asleep quickly when closing your eyes on a bus is because you were already on the bus for a while and got used to all the repetitive sensory data. | 
