bee是“蜜蜂”的意思，我们常说“勤劳的小蜜蜂”，就是因为小蜜蜂总是忙忙碌碌的，所以as busy as a bee引申为忙得团团转。

【例句】
She is as busy as a bee in the morning.
早上她总是忙得团团转。

Mum is always as busy as a bee in the morning.
妈妈每天早上都忙得不可开交。