In his speech on Thursday, President Obama challenged those lawmakers who are campaigning to undo his signature domestic issue.

VOA: standard.2010.03.25

And it's that picture of the universe, Kaufman wants to argue, that is challenged by the monotheistic revolution. Again he sees this as a revolution of ancient Israel.

考夫曼提出，正是这个宇宙的大致框架，受到了来自一神论革命的挑战，在考夫曼看来,这是古以色列的一次革命。

耶鲁公开课 - 旧约导论课程节选

and that really challenged me to find other ways to assess their pain or what they needed.

我不得不用其它的办法，来评定他们的伤痛或他们需要的治疗。

在医院工作 - SpeakingMax英语口语达人

(Sound) On the program itself, Griffin was constantly challenged, as in this exchange, where he tries to explain his stance on immigration.

VOA: standard.2009.10.23

To so many readers it has seemed that Eve is actually quoting Milton's much earlier writing, Areopagitica, in her defense, and it has an incredibly unsettling effect. Evil has to be challenged.

对于很多读者，这似乎是夏娃引用弥尔顿,早期的作品《论出版自由》为自己辩护，这又造成了极大的混乱的影响，恶在这里被挑战了。

耶鲁公开课 - 弥尔顿课程节选

But some politicians say this legacy is being challenged, amid proposals to change the 1987 Constitution to allow a parliament system of government.

VOA: standard.2009.08.03

It can be challenged on normal... Yeah, open to challenge. -Right.

一般情况下人们可以挑战。,对，人们可以挑战其中的观点，-是的。

普林斯顿公开课 - 人性课程节选

Earlier this year, the president challenged the private sector to join with government in a nationwide effort to boost student achievement in science and mathematics.

VOA: standard.2009.11.24

Well recall from week zero when we took a very real world phonebook and then just last week we had our volunteer come up with the array of pieces of paper on the board and when I challenged myself and when I challenged our volunteer to find me the number 50 both he and I were able 50 to leverage one assumption.

大家回忆一下,当我们拿着一个现实世界的电话簿,就在上周我们的志愿者,在黑板上提出了纸片的阵列,我挑战自己，也挑战志愿者,要找出同一个,数字。

哈佛公开课 - 计算机科学课程节选

He has challenged the administration's commitment to fighting terror in numerous speeches and interviews.

VOA: standard.2010.02.14

I actually came to UCLA as a Psychology major, but I wasn't being challenged,

其实我刚上UCLA的时候主修心理学，但是觉得没挑战，

什么是认知科学？ - SpeakingMax英语口语达人

"But a baby who has a defect in those brain stem circuits that use serotonin can't do that when challenged and they go on to die."

VOA: standard.2010.02.08

These results are surprising and disturbing and I said there is work to be done at an individual and group level and this young man challenged me to be more explicit about that.

这些结果都出乎意料，而且让人不安,我说过个人和群体都要下功夫,这位同学要我明确地说怎样下功夫。

耶鲁公开课 - 心理学导论课程节选

"I think people really like to be challenged when they go to the cinema and you watch it and you want to go back again and take more from it."

VOA: standard.2010.07.16

Last year for the pieces that do vary year to year a bit, last year's first problem set challenged students to write their first or maybe second or third program using this environment called Scratch.

去年的教材有些地方有略微改动，去年的第一个问题集是让学生,在Scratch环境下,写下自己的第一或第二个或第三个程序。

哈佛公开课 - 计算机科学课程节选

"It is for the BBC, knowing that the party was allowed to stand in the European elections and other elections, then to judge their level of support, to then say, it is therefore fair for them to have a place on Question Time to be challenged along side other political parties as well.

VOA: standard.2009.10.23