Cognize the English Euphemism

English euphemism originated from the need of religion and social contacts.It has the functions of avoiding a taboo,of covering something up or of being polite.Euphemism,which is not only a language but also a cultural phenomenon,is developing together with human civilization,and plays a more and more important role in the communication between human beings,as well as between nations.The cognition of its origination,function and using skills is very important to English learning.