他的小困惑真是甜蜜——他很乐于奉献……

The obsessions he has are just so sweet - he's so dedicated…

我的姑姑凯瑟琳活泼美丽，是个乐于奉献的人。

My aunt Kik was beautiful, lively, and giving.

赛琳娜，你怎么用三个词形容你自己？忠诚，善良，乐于奉献。

Selena, how would you describe yourself in three words? Loyal, kind, giving.

审稿人必须具备较高的学术水平、尚的职业道德和乐于奉献的精神。

They must have high academic standing, lofty profession ethics and contribution spirit.

对陌生人友好也会让自己感觉更好。更有研究显示乐于奉献的人身心会更健康，寿命会更长。

Doing nice things for people makes us feel better. In fact, studies show that those who volunteer reap health benefits that may help them live longer.