As busy as a beaver:
work very hard and actively.
表达 “as busy as a beaver（像海狸一样忙碌）” 用来比喻 “人们十分勤劳，工作非常努力，忙得不可开交”。
例句
Ziqi is as busy as a beaver today. She hasn’t stopped working for even a minute.
子琪今天忙得不可开交。她一直在工作，一分钟也没停歇。
I’m as busy as a beaver working on this new project. The boss wants it finished by the end of the week.
我正在做这个新项目，忙得不可开交。老板要求在周末前完成。
John can’t come for lunch as he said he’s as busy as a beaver at the moment.
约翰不能来吃午饭了，他说他忙得团团转。
