what is up与what is happen的区别

what is up与what is happen的区别 看美剧what up与what's up区别,what is happened与what happened区别 What is up you What is up what is new/up? WHAT IS UP? what is up? What is up? what is up? what is up?deyisi? what is up hello,what is up SO WHAT 和 WHAT IS UP what is what's up means? what is up翻译中文 Hey man!what is up! “what is up?”如何回答? “what is up?”如何回答?