"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

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

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

Speaking after a meeting with the Democrat chairmen of the congressional budget committees, the president issued a challenge to his critics.

VOA: standard.2009.03.17

Because it also means that every day we don't do something, we are not meeting a challenge.

因为这意味着,如果每天我们不去做些事情的话，我们所面临的挑战。

普林斯顿公开课 - 人性课程节选

Another problem is access. Connecting informal communities to the city's water pipeline is a challenge because many are living on the land illegally.

VOA: standard.2010.08.04

Finally I want to oppose a challenge to you and ask you a question.

最后我想挑战一下你们,给你们留个问题。

麻省理工公开课 - 媒体、教育、市场课程节选

Most vaccines help prevent disease in children,but reaching children in remote rural areas is often a challenge especially in poorer and war-torn countries.

VOA: standard.2009.12.28

There really can't be a challenge to them from the state itself.

绝对统治者不会允许在国内,有任何对于他们权威的挑战

耶鲁公开课 - 欧洲文明课程节选

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

VOA: standard.2009.04.24

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

This speech is a challenge.

它是一个挑战。

耶鲁公开课 - 弥尔顿课程节选

"Like the young people, this is a challenge to do in his life,".

VOA: standard.2009.11.08

The Athenians refuse to tolerate Socrates because they know he is not harmless, that he poses a challenge, a fundamental challenge to their way of life and all that they hold to be noble and worthwhile.

雅典人拒绝容忍苏格拉底,因为他们明白他并非无害，他公然挑衅，社会本质的生活方式,及他们视为崇高及值得的观念。

耶鲁公开课 - 政治哲学导论课程节选

"I know starting your careers in troubled times is a challenge,"

VOA: standard.2009.05.14

So literary can sometimes be very abstract like mathematics, and therefore, if someone says make me a movie, showing me what the square of minus two means that is going to be a challenge.

文学有时候也可以很抽象,像数学，因此如果有人说,给我做一部电影吧,给我展示一下负二的平方,那将是一个挑战。

麻省理工公开课 - 电影哲学课程节选

Next month,the former Alaska governor heads to Arizona to campaign for her former running mate, Senator John McCain, who faces a challenge in the Republican primary from former Representative J.D.Hayworth.

VOA: standard.2010.02.09

That might be a good way to do it but it's going to be more of a challenge because you might - you're going to have a lot of these non-coding sequences that are in the way.

这或许是个好方法,但这会带来更大的问题,因为也许--,会有许多不编码蛋白质的序列,干扰你的筛选

耶鲁公开课 - 生物医学工程探索课程节选

One of the most closely watched cases this term will be heard early next year when the high court considers a challenge to gun control laws in the city of Chicago.

VOA: standard.2009.10.05

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

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

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

While this past year has been a challenge for the opposition Green Movement, senior scholar Gary Sick of Columbia University says that in the aftermath of the election, the Iranian government also faces a huge challenge.

VOA: standard.2010.06.11

It's a challenge, and Eikhenbaum's essay that you read for today is in part--to a degree that it can't really come out and talk about, or doesn't want to come out and talk about it a response to Trotsky's book.

而艾肯鲍姆在论文中,却并没有回应托洛斯基的书，艾肯鲍姆并不想回应,不愿站出来回答。

耶鲁公开课 - 文学理论导论课程节选

"This nuclear testing poses a grave threat, a challenge to the NEPT regime and also poses a grave threat to the peace and security,stability, not only in the Northeast Asian region, but also the whole global community,".

VOA: standard.2009.05.25

Why is testing always a challenge?

测试为什么经常是个挑战呢？好？

麻省理工公开课 - 计算机科学及编程导论课程节选

So the first challenge is, how do we reach all the women who do not have access to a prevention program?"

VOA: special.2009.07.29

So we use his works as a challenge to say "No".

所以我们把他的成就当作一种挑战，说“不”。

以爱因斯坦为榜样 - SpeakingMax英语口语达人

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