pay back 和 pay off的用法?

pay back 和 pay off的用法? pay,pay for,pay back,pay off,pay back for的用法 pay back、pay off pay off和pay back选题 pay for 和pay back的区别? 翻译 pay back pay up pay off pay down pay off/back/for/on的区别 pay back 和pay back 区别 pay off 与 pay off 的区别 pay back和pay off的区别是什么啊.那个有“付出努力,最终得到回报”的意思啊 pay off 与pay back 的区别,哪个词组有表示偿还的意思,是pay off吗 repay 和pay back