发现
verb A1- to notice; to become aware of
- to discover; to find; to detect
- a discovery
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From the library
到家以后，他想给妈妈打电话，才发现手机不见了。
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。
其次，研究发现，经常在绿地中散步的人，压力更小，心情也更愉快。
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