"I think one needs to recognize given the current state of relations it is difficult to describe it as a strategic one anymore.

VOA: standard.2009.10.27

It is a little bit difficult in the sense that to have gotten into Princeton, one almost certainly has had to know something about something. Right?

之所以比较困难是因为,一个人如果想要进入普林斯顿大学，他一定,对某个领域有一定了解？

普林斯顿公开课 - 人性课程节选

And it's also, it's a really difficult one.

当然也是最难的一个。

韩国人经常犯的失误 - SpeakingMax英语口语达人

"We have just come through what was one of the most difficult decades the middle class has ever faced a decade in which median income fell, and our economy lost about as many jobs as it gained,".

VOA: standard.2010.01.25

I want to illustrate one of the reasons why it has been so difficult to get a grasp on the hair cells in the inner ear.

我想用图例为大家说明一下,为什么难以捕获内耳中的毛细胞。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

He says the process of sorting through those areas, which include sites around the country,but concentrated in the mountainous northern areas, will be a long and difficult one, though it is work that needs to be done in the name of the victims' families.

VOA: standard.2009.12.18

And this is no surprise if what we are is the workings of our physical brains, but it is extremely difficult to explain if one is a dualist.

如果我们的本质就是生理大脑的活动,那这也就没什么可惊奇的,但对于二元论者来说,解释这些却是非常困难的

耶鲁公开课 - 心理学导论课程节选

He learned Dutch-- and Dutch is a very difficult language-- in 1696, while the Turkish war went on, or one of them he went off to Western Europe incognito as an embassy soldier.

他学会了荷兰语,荷兰语是很复杂的,在1696年,当土耳其战争发生的时候,或者其中一次战争时,他以一名大使馆军人的身份匿名去了西欧

耶鲁公开课 - 欧洲文明课程节选

So if you're trying to make a more complicated organic molecule carbon-carbon bonds are one of the most difficult things to make in organic chemistry, and it turns out that c n minus is a very reactive molecule, so it's a good way, even though we'll go over some drawbacks in a second, it is a good way to make carbon-carbon bonds.

如果你要合成一个更复杂的有机分子,碳碳键是有机化学中,最难制造的键之一，而实际上氰离子是一种具有很高活性的分子，用它是一个好办法，尽管我们一会儿将看到它的一些缺点，但它的确是一个制造碳碳键的好方法。

麻省理工公开课 - 化学原理课程节选

And one reason Bowman believes this is that we have such a difficult time in understanding other peoples and other cultures is that the very idea of defending one's honor has largely been devalued in the modern west.

鲍曼给出了一个理由,正是因为西方社会中,对维护荣誉的观念早已淡化,才导致他们对其他社会群体,和特定文化的不理解。

耶鲁公开课 - 政治哲学导论课程节选

See you Friday. We'll finish on calorimetry and thermochemistry and then we'll start in on one of the really most difficult topics that we'll deal with all semester, which is a second law and our special function that

好，我们周五见,我们会讲完量热法,和热化学的内容，然后我们会开始,讲这个学期最难的话题之一,第二定律以及我们

麻省理工公开课 - 热力学与动力学课程节选