Cranberry｜薄荷阅读
be in sb's debt
You use debt in expressions such as I owe you a debt or I am in your debt when you are expressing gratitude for something that someone has done for you. 欠某人的人情债；受某人的恩惠；感激某人
eg：I know I shall feel for ever in her debt.
我知道我将会永远感激她。
