"I've always loved working with the robots. And when I first started it was a challenge working with the robots, understanding how they worked and figuring them out.

VOA: special.2010.07.28

To tolerate Socrates would be to say to him that we care little for our way of life and that we are willing to let you challenge it and impugn it every day.

若是容忍苏格拉底,就像在对他说,我们不是很在意我们的生活方式,我们愿意让你提出挑战并日日进行抨击。

耶鲁公开课 - 政治哲学导论课程节选

So I think that it's true that the economy is difficult and there is big challenge in front of us.

所以我觉得，目前的经济形势真的很困难，我们面临着很大的挑战。

事业就是挑战 - SpeakingMax英语口语达人

She praised the government of Cap Verde for spending wisely money it is receiving from the U.S.Millennium Challenge Account.

VOA: standard.2009.08.16

Now that's not a very realistic assumption and we are going to come back and challenge it at the end of semester, but this will be complicated enough to give us a lot of material in the next ten weeks.

这不是一个很符合实际的假设,在期末的时候我们再来推翻这个假设,但是就这个假设下的内容,就足够我们接下来的十个星期学的了

耶鲁公开课 - 博弈论课程节选

He calls it "cow power to horsepower." Leonhardt says the challenge is to cost-effectively remove impurities from the manure-derived methane.

VOA: standard.2010.02.23

There are not many countries in which, for instance, ; that sort of religious challenge, say, to science; it happens more frequently in this country.

比如说，很少由国家，那里宗教对科学造成的威胁;,比美国还要频繁。

普林斯顿公开课 - 人性课程节选

It is expected that Democrats will have a tougher challenge in motivating their supporters to get out to vote this year.

VOA: standard.2010.05.04

Let's see if we can do that, and it's a little bit of a challenge for the performer.

让我们看看能不能做到这个,对于表演者来说,还真是个挑战呢

耶鲁公开课 - 聆听音乐课程节选

"It is the challenge of the 21st century," "We have to acknowledge, accept and work with it.

VOA: standard.2009.05.13

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选

But it is a challenge that needs to be addressed immediately before it is too late,".

VOA: standard.2009.04.24

And the challenge then is, for us, if our goal is to become practical idealists is to understand what it is that brings about change and then do it.

困难在于，如果我们想成为实践理想主义者,就要理解是什么带来改变然后去做。

哈佛公开课 - 幸福课课程节选

But,it says wiping this deadly disease from the face of the earth poses a formidable challenge.

VOA: standard.2010.05.21

For you or for me, it is not a challenge to walk around these cubes, or the audience or somebody from different points of view and recognize that they are really the same person.

对于我们这样的人，换个角度绕场行走，围着某个观众或者其他人去走,会认识到他们是同一个人。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

"It is a challenge after just a few months of implementation to be able to speak with confidence about when these things will occur,"

VOA: standard.2009.09.04

But you know, I understand it's a challenge when you're coming from a language that doesn't have any concept of an article.

但是，我能够理解当你的母语没有冠词的概念时，它将是一个挑战。

经常犯的失误 - SpeakingMax英语口语达人

That is our basic challenge now,". Geithner says it will take some time to bring down unemployment levels, which in October reached a 26-year high in the United States.

VOA: standard.2009.11.12

Also, shows you something about the challenge of it, because we are susceptible to attack from lots of different kinds of microorganisms.

同样也向你们展示这其中的一些挑战,因为我们也容易受到,各类微生物感染的危害

耶鲁公开课 - 生物医学工程探索课程节选

We want it to emerge from this period of challenge stronger,".

VOA: standard.2009.03.30

It never lost entirely its original character as an insurgent movement, independent of the state and hostile to it, making claims that challenge the secular authority.

它从来没有失去充满,反抗精神的本原色,它独立于国家并与之格格不入,公然向世俗权威发起挑战

耶鲁公开课 - 古希腊历史简介课程节选

There's no vision to it." "There's no goal. There's no challenge." "Obviously there are a lot of people that are unhappy about the potential of altering the future of space flight."

VOA: standard.2010.04.15

What it meant was that in principle, your power was greater than any challenge that could come from those underlings, those craven reptiles in your imagination over whom you ruled.

这意味着在原则上,你的权利大到,不会受到属下的任何质疑,在你的眼里他们应该是低声下气的应声虫

耶鲁公开课 - 欧洲文明课程节选

For Garson,it has been a challenge to put aside his concerns about Haiti, and focus on football and the most important game of his career, but he has a simple message to Haitians.

VOA: standard.2010.02.04

That's a very difficult challenge in the Senate right now. It's not looking very good these days,

目前这在参议院是很大的挑战。现今的形势看上去不容乐观。

对全球变暖的政策 - SpeakingMax英语口语达人

In an opinion piece published in the Times of India newspaper she said the United States and India which have both experienced searing terrorist attacks should intensify anti-terrorism cooperation, and encourage Pakistan as it confronts the challenge of violent extremism.

VOA: standard.2009.07.17

And it was a challenge for a while, but I enjoy learning different languages.

当时那还真是个挑战，但我喜欢学习不同的语言。

第二外语，英语 - SpeakingMax英语口语达人

"Tea is the world's second most popular drink, second to water, and there are literally thousands of tea formulations around the world, so the challenge for us, isn't finding new tea recipes, it's focusing and making sure we're developing things that are going to work."

VOA: standard.2010.02.17

And scientists have been working on this for years and there's been progress, but it's still a very difficult challenge.

科学家们对此已经研究很久了,并取得了进展,但仍有很大挑战

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Now for the hacker edition, if you are feeling up to a bit more of a challenge you'll find that when you run the game, one it's not all that hard to use some ASCII art just make it a little fancier as the teaching fellow who implemented this solution did.

对于升级版，如果你能应付更大的,挑战，你会发现当你在玩这个游戏时，用一些字符画把它做得,比那些教学人员做的更有新意,并不是那么困难。

哈佛公开课 - 计算机科学课程节选