What is up?what is new

问题描述:

What is up?what is new
这两句有打招呼问候的意思吗?有几个意思几种用法

What is up?有打招呼的意思,同时也具有别的意思:
what is up 近来可好
what is up 未来会怎样
What is up 出了什么事
可是what is new不是问候的意思.按一般的翻译应该是什么是新的?