短语
中文翻译：忙于某事
同义词：
['engaged in', 'occupied with', 'preoccupied with']
例句：
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1. She busied herself with her work all day long.
她整天忙于工作。
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2. He was so busy that he couldn't even spare time for exercise.
他太忙了以至于连锻炼的时间都没有。
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3. The project is so complex that we are all busy ourselves.
这个项目太复杂了，我们都忙得不可开交。