"I think there'll be a message if the United States decides not to commit in a robust way to Afghanistan.

VOA: standard.2009.10.16

But if I'm poor and I'm desperate, like I might commit a crime to feed my family and that can affect others.

但如果我又穷又绝望，我就可能会为了养家糊口而犯罪,那就影响到别人了。

耶鲁公开课 - 公正课程节选

So your position may be not believed, and I want to claim that that's connected to the idea that you can't commit yourself to your policies.

也就是说选民未必相信你的立场,我要指出的是这与,你无法执行相应政治策略是相关的

耶鲁公开课 - 博弈论课程节选

"I hope the Obama administration will learn from that and not continue to commit the same mistake."

VOA: standard.2010.01.03

"You know,forecasting's become a very hazardous business so I don't want to commit myself too much.

VOA: standard.2009.12.20

This is a broken society, it is a fragile society, so I think you have to live for the future, commit for the future, teach for the future."

VOA: standard.2010.04.19

"I believe that this nation should commit itself to achieving the goal before this decade is out of landing a man on the moon and returning him safely to Earth,"

VOA: standard.2009.07.16