大多数人都不知道，咖啡因有一个长达八小时的半衰期，不仅会影响你的入睡能力，而且还会影响你的睡眠质量。
Most people are not aware that caffeine has a half life of up to eight hours and can affect not only your ability to fall asleep, but also the quality of sleep you are getting.
由于婴儿的大脑很难在两种不同类型的睡眠状态——动态睡眠和静态睡眠之间实现过渡，在婴儿床入睡上还会影响睡眠。
Being in a cot also disrupted sleep, with the babies' brains less likely to make the transition between two types of sleep called active and quiet.
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