我要学习关于鞋业的商务英语，买什么书最实用？

Happiness
We have many definitions for the term happiness,we also blessed perfect conclusion like“Happy families are all alike, while unhappy families are unhappy in their own ways”from the known Russian author,people are longing for happy life, happy family or even happy ending for a good story, then you may wonder what is happiness and who are really in possision of it?
Undoubtedly,answers are diverdified for different people,the status of being happy is a relative and temporary expression,a student will be happy of finding a good job upon graduation, but later maybe he will feel boring about the daily routine and consider changing,we may feel happy of makign new friends but we may break our friendship for different ideas over things,and we have so many examples for this,hence only those who with broad mind, enriched knowledge and positive attitude can hold the hand of happiness for a long time and benefit a lot from it,if you can't change the world, then try to ch