他们为人类的幸福而努力工作。

They laboured for the happiness of mankind.

youdao

只有整个人类的幸福才是你的幸福。

Only the whole human happiness is your happiness.

youdao

我们为人类的幸福而努力。

We Labour for the happiness of mankind.

youdao

So, you've got the best possible balance of wonderful pleasures and wonderful, fantastic experiences, since that's all there is to human wellbeing.

你获得最平衡的,美妙的快乐和美妙的体验，因为人类幸福仅在于此。

耶鲁公开课 - 死亡课程节选

His view is man was happy and good before the invention of society, which society corrupts man and takes away from him his happiness.

他认为在社会形成以前,人类是幸福快乐的,社会使人类堕落并剥夺了人们的幸福

耶鲁公开课 - 古希腊历史简介课程节选