动词
中文翻译：学习
同义词：
['learn', 'study', 'investigate', 'examine', 'research']
例句：
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1. I enjoy studying history in my spare time.
我业余时间喜欢研究历史。
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2. The scientist studied the effects of pollution on the environment for years.
这位科学家研究了污染对环境的影响多年。
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3. Students are encouraged to study abroad for further education.
鼓励学生出国深造。