汉译英“留的住的叫幸福，流逝的叫遗憾。”

The remainable things are called "happiness", in contrast, the withered things are called "regret".

Remains calls happiness which lives, passes calls the regret。

What can be kept is happiness, and what is lost is regret.
怎么我的看法正好相反呢？

Happiness is that can be kept ,regret is that has gone away.

Happiness is what you can get hands on , Pity passedby forever