忙于的英文短语：be busy with
例句：
我一直忙于购物之类的事情。
Ive been busy shopping and things.
现在她正忙于完成卡罗琳女王的传记。
Now she is busy finishing off a biography of Queen Caroline.
我最近一直忙于了结训练班的.事。
I have been very busy settling up things about the training course.
虽然亨利总是忙于送信，但他从不抱怨。
Although he is always busy delivering mails, Henry never complains.
他们忙于在海洋之间巡访。
They were too busy visiting sea after sea.
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