所以快乐是报酬，而快乐来源于为他人服务。

So happiness is the reward, and happiness comes from serving others.

youdao

从以前到今时今日，我这一生之所以快乐，皆因我做了自己真正想做的事情。

The most happy years in my life, including today, have been a result of doing the things I want to do.

youdao

我读书，所以我快乐。

I read so I am happy.

youdao

It could be called something which is a kind of pleasure and which therefore could be subsumed under the pleasure principle and would obviate the need for a theory of the death drive as Freud develops it in Beyond the Pleasure Principle.

可它也可看作是一种快乐,所以可以被归结到快乐原则中去,并且排除了弗洛伊德在《超越快乐原则》中阐述的,死亡驱动所需的理论基础。

耶鲁公开课 - 文学理论导论课程节选

At this point, we say something like, pleasure is worth having for its own sake.

这时我们会说，因为快乐是好的所以值得拥有。

耶鲁公开课 - 死亡课程节选

So, father and son, happy ending, they both have their Noble prizes.

所以，父子有一个快乐的结局，他们都获得了诺贝尔奖。

麻省理工公开课 - 化学原理课程节选