短語詞組短語be very busy with sth 忙于be busy with homework 會(huì)忙著做作業(yè);功課忙;忙著功課be busy with writing 忙于寫作be busy with sty 忙于to be busy with 忙著be busy with research 忙于研究工作be busy with sth 于某事;忙于某事;忙于;忙于做某事be busy with detail 忙于對(duì)付be busy with research work 專心于研究工作 返回 be busy with