busy: stresses activity as opposed to idleness or leisure: too ~ to spend time with the children.


industrious: implies characteristic or habitual devotion to work: a people ~ by nature.


diligent: suggests earnest application to some specific object or pursuit: very ~ in her pursuit of a degree. （pursuit事业：指投入极大热情的工作: IT is his pursuit他的事业是IT）


assiduous: stresses careful and unremitting application: mastered the piano only after ~ practice. (assiduous想象成ass驴认真不懈地推磨)


sedulous: implies painstaking and persevering application: a ~ reconstruction of the events of that night.


busy忙碌: 强调活动而不是空闲休闲，industrious勤劳: 指特别的(characteristic特色特别)习惯性的投入工作，diligent勤奋: 指认真热情(earnest认真热情==sincere真诚认真+zealous热情)地致力于目标事业(application应用这里译成致力于)，assiduous勤勉: 形容认真仔细坚持不懈(careful,unremitting)地致力于，sedulous也是勤勉: 形容极其认真仔细坚持不懈(painstaking形容研究调查等极其仔细缜密,persevering毅力)地致力于,程度更强。


记忆方法: 1）首字母BIDAS想成IS BAD好不好: 忙碌好不好


         2）忙碌的意思是积极从事或被某事占据mean actively engaged or occupied.