busy表示adj. 忙碌的；占線(xiàn)；繁華的；愛(ài)管閑事的vt. 忙著(zhù)做某事；使奔走；使經(jīng)營(yíng)；n. 〈英俚〉偵探；包打聽(tīng)；
be busy with/at/over sth.
be busy in doing sth, in可以省略
作及物動(dòng)詞. 使忙于busy oneself with/at/about/in