His sons who are busy working don't care for him on his special day.

在他的这个特别日子里，他忙于工作的儿子们也不关心他。

youdao

My parents were busy working everyday.

我父母每天都忙于工作。

youdao

I hate to interrupt a man when he's busy working.

一个人忙于工作时，我最不愿打搅了。

youdao

Benjamin was a quiet boy. For much of the time, his parents were busy working in his father's store.

VOA: special.2009.10.11

And Johansson was busy working on her movie career.

VOA: special.2009.10.09

So while Netflix is busy working hard on becoming the next type of TV station, Aereo is working on becoming the next type of cable company.

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And while the crew at Firaxis is busy working on the next computer strategy game, traditional board strategy games have been making a revival as well.

CNN: The rebirth of turn-based strategy games

She currently spends a disproportionate amount of time managing this jewelry business, but is constantly looking for other ways to stay busy working on other projects.

FORBES: Joan Rivers' Celebrity Business