短语动词
中文翻译：在
同义词：
['spend a lot of effort on', 'put in a lot of effort for']
例句：
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1. She tookgreat pains to prepare the presentation.
她非常努力地准备演讲。
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2. The team worked hard to win the championship.
团队努力工作以赢得冠军。
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3.He spent a lot of time studying for his exams.
他花了很多时间复习考试。