refund是等于pay off还是pay back?

refund是等于pay off还是pay back? pay back、pay off 翻译 pay back pay up pay off pay down pay off和pay back选题 pay back 和 pay off的用法? pay,pay for,pay back,pay off,pay back for的用法 pay off 与pay back 的区别,哪个词组有表示偿还的意思,是pay off吗 pay off/back/for/on的区别 pay sb back 意思是? back pay 补发工资还是欠薪? pay off 与 pay off 的区别 pay back 和pay back 区别