dług wdzięczności

I think America's in a debt of gratitude to you.

"Is this our friend to whom we owe a very deep debt of gratitude?"

"I can see why you felt a debt of gratitude."

I, too, as you said, have a debt of gratitude to pay him.

And then when you saw the role the debate on the war took during the campaign, I think there is a serious debt of gratitude.

They became good friends and I've always owed them all a great debt of gratitude.

Another says that he would take the opportunity to pay off debts of gratitude.

It is an appropriate moment to remember the debt of gratitude we owe to them both.

We owe a debt of gratitude to them and their families.

It is also sometimes translated as a "debt of gratitude."