"Today I say to you that the challenges we face are real, they are serious and they are many.

VOA: special.2010.01.23

Science is very hostile to innovation when it challenges existing theory, sort of like management, the same thing.

科学对创新是有敌意的,当创新在挑战已存在的理论，跟管理一样，同样的道理。

麻省理工公开课 - 固态化学导论课程节选

Something that also stimulates your brain. So you just don't focus on small things or small challenges.

一些会激发你的大脑的东西。所以你就不会关注小事情或小挑战了。

学外语的时候 - SpeakingMax英语口语达人

He promised that the government will meet what he called "the huge challenges ahead of us."

VOA: special.2010.05.22

I think what part of Sustain Dialogue does and just being in community with people it also challenges you. -It does.

我觉得，“持续对话“所做的部分活动,和与你不同的人在一起交流,这很有挑战性，-的确。

普林斯顿公开课 - 人性课程节选

So someone returning from mass displacement, even though I'm sure are thrilled to be going home, they bring with them all sorts of challenges upon their return."

VOA: special.2011.07.06

And that created enormous challenges, of our capability and systems and process to deal with this tremendous growth and expansion.

这也为我们带来了极大地挑战，公司的能力和机制与,快速的成长和扩张不符。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

She wants children to know that "their challenges may also become a gift."

VOA: special.2009.07.31

I wrote my first book--I already talked about that, Pioneering Portfolio Management--that deals with the challenges that face institutional investors.

我写的第一本书,我已经提到过了,《机构投资的创新之路》,讨论了机构投资者所面临的挑战

耶鲁公开课 - 金融市场课程节选

Bevis says the winter lodge is no more. Children are spread out in their own homes facing all kinds of challenges.

VOA: standard.2009.12.11

Now there are challenges to a plant based diet which made eating meat important to humans in human history.

在人类历史上,以素食为主的饮食方式面临各种挑战,使得进食肉类变得重要

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So we are going to be fighting a huge number of technology challenges. Then there is the whole scale issue.

VOA: standard.2009.09.24

And we've had our successes and we certainly have had our challenges.

我们已经获得了成功，当然也有挑战。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

While East Timor faces many challenges, U.N.Special Representative Khare says it is on the path to becoming a vibrant democracy.

VOA: standard.2009.08.27

The institutions and the ideas therefore, that provide for freedom and improvement in the material conditions of life, cannot take root and flourish without an understanding of how they came about and what challenges they have had to surmount.

故此,这些机制和理念,为物质生活条件的自由和改善,提供了基础,但在不知道其根源且,无法预料的挑战之前,机制和理念是不可能扎根的

耶鲁公开课 - 古希腊历史简介课程节选

But President Obama recognized that, for the most part, Republican opposition remains one of the biggest challenges to his plans.

VOA: standard.2009.10.10

I'll then pose some of the questions and the challenges we are facing in the area of access in sustainability.

随后我将提出,在获取稳定这方面,我们所面临的问题和挑战。

麻省理工公开课 - 媒体、教育、市场课程节选

One of the greatest challenges will be making enough trained teachers and facilities available in state-run schools, especially in rural areas.

VOA: standard.2010.04.01

Problem Set One will be posted on the course's website tonight by 7:00 p.m. It will very clearly walk you through the week's challenges.

习题集1今晚7：00，将在课程的网站上贴出来,它将非常清晰地带领你们,通过这个星期的挑战。

哈佛公开课 - 计算机科学课程节选

Added to the mix of challenges facing the new U.S.and NATO commander are the dynamics of Afghanistan's August presidential election.

VOA: standard.2009.06.15

The approach of this course, with all its challenges,is the opposite.

本课程的做法，正好相反。

哈佛公开课 - 幸福课课程节选

The president used the opportunity to reflect on the challenges that he has faced in his first year in office.

VOA: standard.2010.01.17

Their early challenges to Socrates show them to be potential philosophers.

他们早先挑战苏格拉底,展示出他们是潜在的哲学家。

耶鲁公开课 - 政治哲学导论课程节选

It paid for my daughter's daycare expenses. I did have other challenges because my daughter does have cerebral palsy and epilepsy.

VOA: standard.2009.12.04

The challenges that... First of all, you got to understand that learning a language takes time.

挑战就是，首先，你必须明白学习一门语言是件耗时间的事。

学第二外语的时候 - SpeakingMax英语口语达人

member nations to assume their share of responsibility for dealing with global challenges including climate change and non proliferation.

VOA: standard.2009.09.23

I think that is one of the fundamental ongoing challenges.

这也是一个根本性的持久的挑战。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

(OMITTED) He recently spoke at a conference on the challenges of diagnosing cancer in Nigeria -- a meeting he helped organize.

VOA: standard.2010.06.16

Fundamental challenges to the social order.

都从根本上挑战者社会秩序

耶鲁公开课 - 美国内战与重建课程节选

And so by listening and encouraging, I help students see that there's a way to resolve any challenges that they might face.

如此，通过倾听和鼓励，我让学生们看到他们有办法,去应对面临的一切挑战。

普林斯顿公开课 - 人性课程节选