新东方claire老师在讲900句时提到这个说法。
我会报答你的:I will repay you。
另外还有I owe you 我欠你个人请。I’m indebted to you.感激你的大恩大德。
原句大致可以翻译为:Thank you very much. I am indebted to your benefaction(是恩情的具体而定,可以换成help,support等) and I really hope that one day I can repay you.
i own you.
i will return to you.