科学家
word A1- scientist
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科学家发现，睡眠并不是一种单一的状态，而是由浅睡、深睡和快速眼动睡眠组成的周期。
屠呦呦是中国著名的科学家，也是诺贝尔奖的获得者。
她是中国第一位获得科学类诺贝尔奖的本土科学家。
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