"With the magnitude of the challenges we face, what we need in Washington are not more political tactics,"

VOA: standard.2009.03.17

Those are just a few of many challenges we face in the future.

这仅仅是我们将要面对的,挑战中的小部分。

麻省理工公开课 - 媒体、教育、市场课程节选

To that,I say that the challenges we face are too large to ignore,"

VOA: standard.2009.03.21

"Today,I say to you that the challenges we face are real.

VOA: standard.2010.01.15