How long is it to lunch?

离吃午饭还有多久？

《牛津词典》

How long is it since we last went to the theatre?

我们多久没去看戏了？

《牛津词典》

How long is it since he left this school?

他离开这所学校有多长时间了？

youdao

Fahmy Howeidy, a prominent Egyptian columnist, says it is not clear how long or how inclusive the new border opening will be.

VOA: standard.2010.06.01

With simple branching, how long is it going to take to run a piece of code?

但是在简单分支程序中，执行一个程序,要多长时间呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

how long is it going to take to build it,

估算它要花费的时间，

在广告公司工作 - SpeakingMax英语口语达人

How long is it before the Feds start investigating and end this cozy arrangement?

FORBES: Medtronic's Back Surgery Woes Worse Than People Think

"We always kill the well, it's just how long is it going to take to do it, " he says.

CNN: John D. Sutter

How long is it going to take for somebody on one of these defenses to break every bone in his body?

WSJ: Waiting for Tim Tebow to Go