心存感激，常思回报 英文怎么说

I am grateful, and often think of return.

grateful    英[ˈgreɪtfl]    美[ˈɡretfəl]    adj.    感激的，感谢的; 令人愉快的; 宜人的; [例句]She was grateful to him for being so good to her他对她这么好，令她很感激。

I am thankful/obligated, and to be waiting for the payback time.

obligated    英[ˈɒblɪgeɪtɪd]    美[ˈɑ:blɪgeɪtɪd]    adj.    有义务的; 必须的; 有责任的;   v.    使负有责任或义务（ obligate的过去式和过去分词 ）;    [例句]I felt obligated to let him read the letter我觉得有义务让他看到这封信。[其他]    原型： obligate    

Full of great gratitude, I will pay off your loving-kindness. 

gratitude 英[ˈgrætɪtju:d]    美[ˈgrætɪtu:d]   n.    谢意; 感激，感谢; 感激的样子; 恩义; [例句]I wish to express my gratitude to Kathy Davis for her immense practical help.凯茜·戴维斯实实在在地帮了大忙，我想对她表示感谢。

loving-kindness    英['lʌvɪŋk'aɪndnəs]    美['lʌvɪŋk'aɪndnəs]   n.    慈爱; 慈爱，仁慈; 恩情;    [例句]When they talk about developing loving-kindness and mindfulness in their meditation, you see it reflected in their actions.当他们谈论在禅修中发展慈心和念住时，你发现这也体现在他们的行为上。

pay off    英[pei ɔf]    美[pe ɔf]    [词典]    付清; （付清工资后） 解雇; <非正>取得成功; 使得益;    [例句]It would take him the rest of his life to pay off that loan.他得用余生来还清那笔贷款。