a debt of honour的用法和样例：
- But it was a debt of honour,incurred from a bet.
- He has a certain debt of honour.
- Gabby, who damaged knee ligaments in United's Champions League draw with Villarreal back in September 2005, says he has a debt of honour to Sir Alex.
- I owe you a debt of gratitude for what you've done.
- We owe you a debt of gratitude for you help.