每日背诵第三期4
Some people are night owls; some are early birds. You probably know which one you are, but did you know that there may be a biological reason why some people are out of bed at dawn while others prefer to burn the midnight oil?
一些人是夜猫子；一些人则是早起的鸟儿。也许你知道你是哪种人，但是你可知道也许是生物的原因，一些人破晓时分就起床，一些人则喜欢挑灯夜战？
(短文节选,本期开始连载：早起的虫儿被鸟吃？)
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