But experts say it is still too high and Pittsburgh has more work to do.

VOA: special.2009.07.13

All these components have to be compatible with each other and it has to work according to a plan, which ultimately is informed by this theory.

所有的零部件都要能够相互兼容,并能发挥作用,按照上述理论

耶鲁公开课 - 金融市场课程节选

It cools down because I'm doing work but the energy has to go somewhere, right?

因为膨胀过程中,对外做功？

麻省理工公开课 - 热力学与动力学课程节选

The piece has a sad sound to it, quite unlike Joplin's earlier work.

VOA: special.2010.01.24

Every risk management device relies on a design and the design is usually complex and has-- it all has to work together.

每种风险管理工具都是基于某种设计,而这种设计通常都是很复杂的,需要各部分相互之间的配合

耶鲁公开课 - 金融市场课程节选

"The president has called for focusing in on what it really takes to be successful in work and in college, and he has called on America's educational institutions, primary and secondary educational institutions, to do whatever it takes to get our kids college ready.

VOA: special.2010.02.25

A vaccination, for it to work around the world, has to be inexpensive, transportable, possible to use without advanced medical personnel, and those kinds of things.

而疫苗接种,为了能适用于全世界,它必须便宜,便于运输,还要能在没有高级医生的情况下使用,它应该具有诸如此类的特点

耶鲁公开课 - 生物医学工程探索课程节选

But he says there's more to it. "It has been hard work.

VOA: standard.2009.08.21

But first of all I wanna welcome you to the Inner Core and I want to say just by introduction how inspiring it has been to work with you over these last years since I've been here. You were part of the group that hired me and I thank you so much for that.

首先，我想欢迎您来到人性讲堂,我想说,仅仅为介绍之便,自从我来到普林斯顿大学以来,近年来跟您的合作是多么的激励人心,当初雇用我的小组里，您正是其中一员，非常感谢您。

普林斯顿公开课 - 人性课程节选

That they defended themselves well is considered a victory, but NATO and Afghan police officials say there is still a lot of work to do before Afghanistan has a police force it can depend on.

VOA: standard.2010.06.16

So leaving aside the specific example of beer, you think about some product that has some dimension on which it varies, and we can use this model to see how competition is going to work in that market.

把啤酒的例子放在一边,你们自己想一些在某种程度上,有所不同的产品,我们使用这个模型来研究,这个市场的竞争是怎样的

耶鲁公开课 - 博弈论课程节选

Democratic strategist and Louisiana resident James Carville: "I know this: every piece of information we have gotten to the size of this, or things that were going to work, none of it has turned out to be true."

VOA: standard.2010.05.31

Insurance relies on this theory of risk pooling but it has to make it work.

保险是基于风险汇聚理论的,并运用其有效降低风险

耶鲁公开课 - 金融市场课程节选