pay off可以做不及物动词.
它的基本含义是：“还清(债务等),付清”,抽象含义是“成功；获得回报”,如：
Did your plan pay off?
你的计划成功了吗?
Our plan certainly paid off; it was a great idea.
"我们的计划当然成功了,那是个很好的主意."
All my effort paid off in the end.
最后,我所有的努力都获得了回报.