I should mention as well a great debt of gratitude to my former instructors.

我也要提一下，个人十分感激前一任老师给我的恩惠。

youdao

All peoples who cherish freedom owe a profound debt of gratitude to your great nation.

所有珍爱自由的人们都对你们伟大的国家深负谢忱的感情之债。

youdao

For all of that, this committee and country owe him a great debt of gratitude.

CNN: AllPolitics - Ethics Transcript

The Association in general, and I in particular, owe Jenny a great debt of gratitude.

BBC: Peter Thompson's speech

"The care I received was outstanding and I owe a great debt of gratitude to my main surgeon Sashin Ahuja and neuro surgeon John Martin, " said Evans.

BBC: Injured Scotland star Thom Evans returns home