be busy at的意思|示意
美 / bi: ˈbizi æt /
英 / bi ˈbɪzi æt /
忙于
be busy at相关例句
I can't stand around and do nothin ', I have to be busy at all times.
我就是不能无所事事,什么都不干, 必须得忙个不停.
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