事实上，幸福和悲伤是成正比的多少欢乐就会有悲伤的数字，我已经学会如何让自己快乐。

In fact, happiness and sadness is directly proportional to the number of how much joy there will be sadness, I have learned how to make yourself happy.

youdao

事实上，幸福和悲伤是成正比的多少欢乐就会有悲伤的数字，我已经学会如何让自己快乐。

In fact, happiness and sadness is directly proportional to the number of how much joy there will be sadness, I have learned how to make yourself happy.

youdao