"Because as I speak to you, Nigeria is not yet fully ready, so I hope some of this will be passed on to Nigeria to force them to be ready in time."

VOA: standard.2009.10.22

When we do relativity, we'll be dealing with vectors in space-time and we'll find that different observers disagree on what is this and what is that.

我们学习相对论的时侯,会涉及到时空矢量的问题,我们会发现观测者们对于观测的结果,有着不同的看法

耶鲁公开课 - 基础物理课程节选

Let's create a graph here that on the x axis it's going to be time, so time zero will be when you first take in a food and then one hour later, two hours later will be shown as you go from left to right, and then we'll have blood glucose level up on the y axis.

我们在这建立一个曲线图,X轴代表的是时间,所以零时间点是你第一次进食的时间,然后一小时以后,两小时以后,是从左到右呈现在图表上的,在Y轴上是你的血糖值

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"Turkish public opinion could not agree with the fact that an Israeli aircraft would be training on Turkish territory, while at the same time there are gross human rights violation being committed in Gaza,".

VOA: standard.2009.10.27

On Friday,the U.S.special envoy to Afghanistan,Richard Holbrooke,said he believes there will be less fraud this time around because only two candidates will be on the ballot and more international teams will be in place to monitor.

VOA: standard.2009.10.24

"And like Lyndon Johnson he has this really ominous problem, which is if you escalate in Afghanistan and we end up in that swamp that will over time be a kind of constant drain on support and enthusiasm among young people, among minorities,among liberals, among progressives and it will really sap the president's ability to continue to energize this broad agenda,".

VOA: standard.2009.12.29

He also offered some tough talk. "I emphasized that this has to be a point in time in which we begin to write a new chapter based on improved governance, a much more serious effort to eradicate corruption, joint efforts to accelerate the training of Afghan security forces so that the Afghan people can provide for their own security,".

VOA: standard.2009.11.02