gratitude

n.

感激，感谢；感激的样子；谢意；恩义

gratitude to sb感激某人

express gratitude表达感谢

debt of gratitude人情债

1. His heart overflowed with gratitude.
   他的心里充满了感激之情。
2. She showed me her gratitude by inviting me to dinner.
   她邀请我吃饭以表示她的感激。
3. We welcome the opportunity to express our gratitude.
   我们能有机会表示谢意十分高兴。
4. We owe you a debt of gratitude for you help.
   承蒙帮助，感恩不尽。

Is gratitude a moral affect?
Is gratitude a moral affect?
Gratitude and Prosocial Behavior
The psychology of gratitude.
Gratitude and Prosocial Behavior: Helping When It Costs You.
Gratitude and well-being: a review and theoretical integration.
The Psychology of Gratitude: An Introduction.
Counting blessings in early adolescents: An experimental study of gratitude and subjective well-being ☆
Counting blessings versus burdens: an experimental investigation of gratitude and subjective well-being in daily life
How to increase and sustain positive emotion: The effects of expressing gratitude and visualizing best possible selves