a new one

(informal)an account, idea, or joke not previously encountered by someone

(非正式)全新的东西：

its separate vapour tank was &B{a new one on me}.

它的隔离蒸气箱是我前所未知的。

what's new

(said on greeting someone) what's going on? how are you?

［用作招呼语］怎么样？你可好？

as is the usual situation

还是老样子

United were unlucky … so what's new?.

联队时运不佳…还能怎样？。