短语
中文翻译：正在做某事
同义词：
['busy', 'occupied', 'engaged in']
例句：
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1.She is up and doing her homework right now.
她现在正忙着做作业。
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2. He is busy with his work and cannot spare any time for socializing.
他忙于工作，没有时间社交。
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3.The students are engaged in a group project, so they can't go out to play.
学生们正在进行一个小组项目，所以他们不能出去玩。