But it was very interesting and challenging.

但我觉得很有意思，很有挑战性。

第二外语，英语 - SpeakingMax英语口语达人

I think this is as good list so let's go and think about what might be a little bit more challenging.

我想上面这些都是很好的例子,接下来我们思考一些更有挑战的问题

耶鲁公开课 - 生物医学工程探索课程节选

We're going to really get into this next class, but I just want to introduce it to you to give us a start, and many of you have used Lewis structures in high school, but we'll be doing some much more challenging Lewis structures, I can assure you, in this class here.

其实我们下节课才会详细介绍它，但是今天我只想以简单介绍作为开始，大部分同学在高中就用过路易斯结构了，但是我们会遇到一些更具挑战性的,路易斯结构，我可以向大家保证，在这门课中会的。

麻省理工公开课 - 化学原理课程节选

And I'd like to leave you with a challenging question.

下面我想留给你们,一个具有挑战性的问题。

麻省理工公开课 - 媒体、教育、市场课程节选

When we find people challenging it, I think they have the bulk of time and human experience on their side when they say you guys got it wrong.

当我们发现有人挑战这一定律时,我只能说他们完全是在白费力气,当他们说道 你们这些家伙是错的

耶鲁公开课 - 古希腊历史简介课程节选

Well, crossword puzzles aren't a very deep subject, and we might wonder whether or not we would do better if we were engaged in something more mentally challenging than that.

填字游戏不算很深奥的东西，我们也不知道自己能否做得更好,如果我们去做,比填字游戏更富挑战性的事情。

耶鲁公开课 - 死亡课程节选

But why did they permit him to carry on his practice of challenging the law and ? the authority of the law for as long as they did?

而是，为何他们一再容许他,挑战法律及法律权威,达这么长一段时间？

耶鲁公开课 - 政治哲学导论课程节选

We differ from lower animals and our brains, which are much more capable of storing and processing information, but we're living in a time of revolution when machines are challenging or competing with our brains.

我们不同于其他低等动物，我们的大脑更能够存储和处理信息，不过身处改革年代,机器开始挑战甚至是,和我们的大脑开始竞争。

耶鲁公开课 - 金融市场课程节选

so it's a very challenging and a place to grow.

所以这很有挑战，也是让人成长的地方。

喜欢加州 - SpeakingMax英语口语达人

because school can be really challenging and stressful,

因为学校的学习很有挑战性也很有压力，

百慕大出身 - SpeakingMax英语口语达人

And it's very challenging.

而且也很有挑战性。

学外语的时候 - SpeakingMax英语口语达人

Is anyone else pre-med here? Okay, so a pretty good showing. So maybe you can relate to some of the reasons I wanted to be pretty pre-med -- part of it was the interest in the science and the biology. Also, I wanted to help people -- it seemed like a really clear way that I could have a career that was challenging and involved in science, but also helping others.

你们中有医学预科的吗？,不错，有不少人,也许你们出于和我当年,想读医学预科一样的原因,一方面是受灾科学和生物学方面兴趣的驱使,另一方面,我想帮助别人,所以我似乎应该选择。

麻省理工公开课 - 化学原理课程节选