There's no telling how long the talks could drag on.谁也说不准谈判还会拖多久。It is an open question how long that commitment can last.这一承诺能维持多久还不确定。How long he'll be able to do so is a moot point.不知道他还能这样做多久。...

how long的音标：how long的英式发音音标为：[hau lɔŋ]how long的美式发音音标为：[haʊ lɔŋ]...

多久，多长...