But first,we talk to some Americans who have retired from their professional lives but still work hard to help others.

VOA: special.2010.07.16

It's actually not impossible, but hard, and there are a number of challenges.

事实上，它并非不可能，只是很艰难，要面对很多挑战。

耶鲁公开课 - 金融市场课程节选

but I made up for it by working really hard on the gym and working really hard on the field.

但我通过体育馆和足球场上的刻苦训练弥补了天赋不足。

足球部队长的领导力 - SpeakingMax英语口语达人

He said life is sometimes really hard, but you can make it a lot better if you try to prepare for it.

VOA: special.2010.05.16

There's the weird diets but hard to classify: Detox Diet, The Rave Diet, so if you're into raves you can go do that, and The Negative Calorie Diet, so these -the Negative Calorie Diet are ones that- where you eat food that have negative calories, so you consume it but it burns off more calories than it actually has.

这些是难以归类的减肥法,排毒法,锐舞减肥法,如果你对锐舞感兴趣,就可以照着做,还有负热量减肥法,负热量减肥法是指,吃具有负热量效应的食物,当你吃它的时候,消耗掉的热量比食物本身所含热量还多

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But he says some countries including Botswana, Mauritius and Cape Verde have worked hard to improve their governance.

VOA: special.2009.11.28

The "parable of the vineyard" assures us that God rewards us regardless of our hard work and investment, but only if we're called, only if God chooses us.

葡萄园的寓言“使我们确信,无论我们是否努力工作都会得到上帝的奖励，但除非上帝选择了我们。

耶鲁公开课 - 弥尔顿课程节选

The Great Recession gave some mothers no choice but to work, as job cuts hit hard at men.

VOA: special.2010.04.23

Now for now, its hard to argue that this is a good thing but it's a common thing.

现在，不好争论这是一个好事情,但这是一个通常的事情。

哈佛公开课 - 计算机科学课程节选

But it was hard for the judges to decide about most other traits under the controlled conditions.

VOA: special.2009.11.24

But that's a little bit hard, we aren't all that good at seeing electrons with our eyes, so we need to think of a way to do this.

但那有一点困难，我们都不能通过眼睛看到电子，我们需要想一种方法去做到它。

麻省理工公开课 - 化学原理课程节选

But small businesses have been hit hard by the recession and now the difficulty in getting loans.

VOA: special.2009.12.18

I think so. But video phone has been very hard to achieve. It's either been to be expensive, or too crowded, or can we use the internet to finally introduce video phone and this is different from video on-demand.

我也这么认为，但视频电话要成功很困难,它要么很贵，要么很拥堵，或者我们是否可以使用互联网引入视频电话,这与随需视频是不同的。

麻省理工公开课 - 媒体、教育、市场课程节选

But Professor Strauss says a banking crisis is especially hard to recover from, because there is less money to lend to support growth.

VOA: special.2009.11.06

But the hard thing in life, is getting you to come out of your own selves a bit, realizing it's "Not all about you."

但是现实中,要走出你自己的小圈子,去发现这个世界还有其他人

耶鲁公开课 - 博弈论课程节选

But she was very serious, very motivated, very hard working type of person and really a kind of good Catholic girl her entire life.

VOA: special.2010.03.08

They're efficient enough that you have to work hard to find opportunities, but not perfectly.

如果你付出足够的努力,还是能发现机会,所以市场并不完全有效

耶鲁公开课 - 金融市场课程节选

But the work is hard. And getting all the oil from the seeds can be difficult.

VOA: special.2009.09.29

It seems sort of hard to believe,but maybe that's the right thing to say.

似乎有点难以置信，但也许这才是对的。

耶鲁公开课 - 死亡课程节选

And what did we talk about?' I try to write notes, but it's very hard.

VOA: special.2009.09.14

But this a huge agenda, and so we are working enough hard here.

然而，这是项庞大的工程，因此我们正在竭尽全力。

普林斯顿公开课 - 领导能力简介课程节选

But he is hard at work. He and his team currently are trying to make algae that can change carbon dioxide back into fossil fuel.

VOA: special.2010.07.20

We are also put in mind of how the war is, in fact, anything but a revel, though it, too, may have been provoked by a cause as insignificant and hard to trace as "some wizard vermin."

我们同样也思考事实上战争，只是一场狂欢，尽管它有可能,是由一个毫不重要难以追踪的“一些害虫“引起的“

耶鲁公开课 - 现代诗歌课程节选

Historians say Patrick Henry was an intelligent boy but not always a hard worker.

VOA: special.2009.04.24

That's an important observation, and as we get to the part of the course we talk about computational complexity, you'll see that what we really care about is not how efficient the program is on easy problems but how efficient it is on hard problems.

我们已经学习了这门课程的一部分了，我们要开始认识到,计算的复杂度这个概念，你会学习到我们在乎的并不是,算法在简单问题上的工作效率,而是解决复杂问题的效率。

麻省理工公开课 - 计算机科学及编程导论课程节选

But it stopped me from doing the work that was too hard for me.

VOA: special.2010.08.01

Everyone can solve it, but this question is hard.

大家都能够回答,但这个问题却很难

耶鲁公开课 - 心理学导论课程节选

Everyone in my office works hard, but some people have had their wings clipped.

VOA: special.2010.06.13

So I mean, people can be really smart or have skills that are directly applicable but if they don't really believe in it, then they're not going to really work hard and they're not going to even if they're smart guy who doesn't have the relevant experience, they're not going to care enough to develop the relevant experience in order to succeed.

就比如说，一个人不仅聪明,而且也有拿来即用的技能,但是如果对于自己的事业没有认同感，他就不会,百分之百的付出,就算他是属于,缺乏经验但智力超群的那类人，他也不会有意识地,为了成功而积累自身经验。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

And then here, the exams and papers are hard, I guess. but I guess harder for international students

在这里，考试和论文都难，我觉得。但是我觉得对国际学生来说更难，

来自西班牙的留学生 - SpeakingMax英语口语达人