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

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

What are some of the particular opportunities and challenges of being a Muslim chaplain in America on a secular university campus?

美国大学中的穆斯林教士,一般都会遇到一些,什么样的机会和挑战呢？

普林斯顿公开课 - 人性课程节选

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

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

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

It's a material force that his rhetoric challenges and relies on, gives him a means of getting off the ground, and a means of always getting back to it, too.

这是他的修辞所挑战的并且依赖的物质力量，这种力量给他离开地面的方法，也给他回到地面的方法。

耶鲁公开课 - 现代诗歌课程节选

Some of the challenges that you see here I mentioned before, so there are problems with drought, with pests, with temperature changes and the like.

我之前提到的,你们所见的这些挑战,如干旱问题,虫害问题以及温度变化之类的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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 challenges presented by freedom and the predominance of reason cannot be ignored, nor can they be met by recourse to the experience of other cultures where these characteristics have not been prominent.

自由的现存挑战,和理性的卓越优势不能够被忽略,同时也不能因为他们的典型性,一时不够显著,而诉求于其他的文明

耶鲁公开课 - 古希腊历史简介课程节选

In fact, we'll talk about that concept throughout the course because one of the big challenges of making these sort of new biological therapies work in people to treat diseases is getting the right molecules into the right cells, at the right period of time.

实际上,我们会讲到一个,贯穿这门课程的概念,因为为了治疗疾病,而采用的新型生物学疗法,所面临的一个大问题就是,如何将正确的分子在适当的时候,转进正确的细胞当中

耶鲁公开课 - 生物医学工程探索课程节选

So I've got one more piece of bad code on this point and this is buggy five dot c. So as a comment on top bug of this file challenges, what is, in fact, the bug.

所以我在这里得到了一块很烂的代码,这个是buggy5，c，所以作为这个文件顶端的注释,那实际上是那个。

哈佛公开课 - 计算机科学课程节选

Socrates' disillusion of that very framework,challenges, it seems to me, the very possibility of political life by questioning the question or the distinction between friend and enemy.

苏格拉底,对这个框架的醒悟，在我看来，挑战了政治生活的可能性,就在他提问,或区别友与敌的问题时。

耶鲁公开课 - 政治哲学导论课程节选

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

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

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