名词
中文翻译：生物钟
同义词：
['biological clock', 'biological rhythm', 'circadianrhythm']
例句：
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1. The animal's behavior is closely linked to itsinternal biological clock.
动物的行为与它的内部生物钟密切相关。
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2. The study of the biologicalclock has led to new insights into humanaging.
对生物钟的研究为人类衰老提供了新的见解。
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3. The researcher found thatthe biological clock plays a crucial role insleep regulation.
研究者发现生物钟在睡眠调节中起着关键作用。