be busy doing

基本解释

Be busy doing sth .
正在忙着做什么…
Her mother is busy cooking in the kitchen. be busy doing sth.
忙着做某事（她的母亲正在厨房忙着做饭。）
The conviction of the parent was that I should be busy doing more important things rather than finding fault with an adolescent's vocabulary.
这名家长唯一确定的事情就是：我应该忙着做一些更重要的事情，而不是找一个未成年人用语方面的岔。

Between the commitee's report in April and then, Mr Howard will be busy doing deals with Mr Harradine and others in the existing Senate to get his original plan through, with a tax on food and all.
ECONOMIST: Australia
Instead, the RNA itself is busy doing jobs that were once thought to be the prerogative of proteins: regulating the transcription of other genes, protecting cells from viral attack and even keeping control of bits of DNA that really are junk (or, more accurately, are parasitic on the whole genomic apparatus).
ECONOMIST: Genomics has not yet delivered the drugs, but it will
Mr. Buffett argues that normal investors should not necessarily be able to find out what professional investors are doing, especially while they are still busy doing it, reminding me a lot of the Not in My Back Yard situation.
FORBES: If Warren Buffett Can Have Secrets, Why Can't I?