The secretary general would not say when the transition might start, how long it will take, or when it might be possible to start reducing the NATO troop commitment.

VOA: standard.2009.10.23

The how long will it take you diets?

还有关于节食周期的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"No matter how long it may take us to overcome this premeditated invasion, the American people in their righteous might will win through to absolute victory...

VOA: special.2011.06.02

They will have to tell how long and how much it would take to pay off a card if the holder makes only the lowest monthly payment.

VOA: special.2009.05.22