broke off的意思和用法

折断 ;中断 ;打断
A branch broke off and I picked it up.
我拾起掉下来的树枝。
He broke off in the middle of a sentence.
他一句话只说了一半就停住了.
I broke off the conversation and answered the phone.
我停下话去接电话。
He took a bar of chocolate and broke it off.
他拿了一块巧克力并将其折断。

断掉了
After I sat on my pencil, its tip broke off.