1) He has been engaged in official duties
他一直忙于公务。
2) His official duties kept him busy.
他公务繁忙。
3) He is busy doing housework.
他忙于做家务。
4) He was busy with his work.
他忙于工作。
5) He concerns himself with trivia.
他忙于琐事。
6) He was busy with his writing.
他忙于写作。
参考词条