释义：

pay off 产生利益，出现好结果，偿还债务

pay off 具有两种含义，一是偿还对方的债务，另一种是像产生利益一样，表示出现了好结果。

例句：

Don't worry about me paying off your debt.
不要担心，我肯定会还你钱的。
I've paid off all my debt.
我已经还清了所有的债。
Sending that e-mail has finally paid off.
发送那封电子邮件带来了好结果。
I'm going to pay off my credit card!
我要偿还信用卡借款。

对话：

A: What are you going to do with your tax return?
如果得到税金返还，你要做什么？
B: I'm going to pay off my credit cards.
我要还信用卡的债。