忙于做某事多种表达

Busy doing something（忙于做某事）；Occupied with something（忙于某事）；Engaged in doing something（忙于从事某事）。相关的词组有：be occupied with（忙于做某事）；be overloaded with（疲于应付某事）；be tied up with（不可开交，脱不了身）...