President Barack Obama has repeatedly described the conflict in Afghanistan as one that the United States cannot afford to lose.

VOA: standard.2009.10.25

overtime you constantly and gradually lose your hearing and it cannot come back.

逐渐丧失了的听力,你很难有复聪的机会。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Smith says the U.S.and its allies cannot afford to lose to the other camp.

VOA: standard.2010.03.18