欠

例句：

1. 1. We have a debt of gratitude to the teacher for her guidance.
   我们对老师的指导心存感激，欠她一个情。
2. 2. He owes me money for the car I lent him.
   他欠我钱，因为我借给他的车。
3. 3. She owes us an explanation for the delay in delivery.
   她欠我们一个解释，交货的延迟。