How does happiness turns to sadness

How does happiness turns to sadness how to find happiness how to presue happiness? Sadness to Sadness to sadness、enerjetic和happiness是什么意思? Happiness,is to cover up the sadness and smile to everybody how to deal with you sadness英语作文,急用 以How to deal with Sadness写一篇英语作文 What is happiness?That is to cover up his sadness for everyo 求英语作文两篇。。How to deal with our sadness？ & How to keep us happ HOW TO GET HAPPINESS 如何获得快乐 share happiness and sadness with each