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

VOA: standard.2009.04.24

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

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

Mr.Obama admits that coordinating the activities of 16 U.S.spy agencies is a major challenge, but he believes Clapper will be able to do so.

VOA: standard.2010.06.05

And so if you choose to elect the hacker edition of this week's problem set the challenge will be to figure out not only how to implement the game but how to implement a solver for the game.

因此，如果你选择这周的应用题目为升级版,那么你将面临的挑战,不仅是如何实现这个游戏，而且,要实现此游戏的解决方法。

哈佛公开课 - 计算机科学课程节选

"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

That's a challenge that we need to always be putting in front of us.

这是常常都应该摆在,我们面前的挑战。

普林斯顿公开课 - 人性课程节选

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

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

"When you put that all together it suggest that we are going to need something like 50 percent more, perhaps 100 percent more, food from our existing land and that is a very significant challenge and we believe we need to be thinking seriously about that right away,"

VOA: standard.2009.10.21

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

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