But still, it's crucial to understand, doing the readings is an important part of learning what this course has to offer.

但仍旧，它很难理解，做课外阅读是学习很重要的一部分,对于这门课所提供给你们的内容而言。

耶鲁公开课 - 死亡课程节选

Something that's really hard to do and when you finally managed to do it,

有时候这很难做，当你终于设法学会的时候，

滑板的魅力 - SpeakingMax英语口语达人

It's a difficult thing to do these things and that's why we need invention.

做这些事很难,这正是我们需要发明的原因。

耶鲁公开课 - 金融市场课程节选

You've got to put yourself in other people's shoes to figure out what they care about and what they're going to try and do, so you can respond well to that.

你要学会换位思考,去分析他们的收益是什么,他们要怎么做,并依此做出回应是很难的

耶鲁公开课 - 博弈论课程节选

This is real, unlike the Joule coefficient which is very small so that most gases have tiny Joule coefficients. So if you do a Joule experiment, you hardly measure a temperature change. With real gases, here you do actually measure it. You can feel it with your finger on your bicycle tire.

系数那样小以至于,大多数气体的焦耳系数,都很小，所以如果你做焦耳实验,很难测量出温度的变化,对于真实气体，你可以测量它，你能通过手指按在,自行车轮胎上来感觉到它。

麻省理工公开课 - 热力学与动力学课程节选

To me, it's, it's difficult to tell independent of what they're doing.

对我来说，很难单独地说出他们所做的一切。

关于网络世界 - SpeakingMax英语口语达人

There's been a lot of work done on these over the years, but in fact, it's pretty hard to invent a good hash function. So my advice to you is, if you want to use something was a hash, go to a library. Look up a good hash function.

已经做过了很多的尝试和努力,但是事实是，很难发明出一个好的哈希函数,所以我给你们的建议是,如果你们想使用哈希功能,到函数库中查找一个好的哈希函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

And if they're a premade salad then it would be even more difficult because you're not constructing it yourself, so it's hard to uses based on these sort of things.

如果那是预制色拉,就更麻烦了,因为那不是你做的,就很难进行统计

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Again it's like anyone who does important things it's hard to judge the whole picture and on that I am sure he has created value for the economy.

同理，对于那些做着重要事情的人们,很难估测大局,不过我很肯定的是,他已经为经济创造了价值。

耶鲁公开课 - 金融市场课程节选