debt of gratitude的用法和樣例：
例句
- Finally, ladies and gentlemen, I am sure you will all agree that we owe a debt of gratitude to the Brown's Company for the use of their fine Hall.
最后，先生們，女士們，我肯定你們都造成我們欠了布朗公司的情，因為他們把這么好的大廳讓給我們使用。 - We owe you a debt of gratitude for you help.
承蒙幫助，感恩不盡。 - I owe you a debt of gratitude for what you've done.
對你所做的事，我欠你一份人情債。
