But the question is how are those of us of this generation, living that ethic out in the early 21st century?

但问题是,我们这代人如何，将在21世纪初的生活中体现这一道德？

普林斯顿公开课 - 人性课程节选

That is a remarkable endeavor and one that I think in the early 21st century which is too much defined by religious conflict should very much be held up and lived out.

这是巨大的努力,我认为这种努力也是,过多得被宗教冲突定义的21世纪初期,应该坚持并实现的努力。

普林斯顿公开课 - 人性课程节选

Second thing, we started talking about the periodic table and I believe that it's a hallmark of any educated person in the 21st century who is technically literate to know the periodic table by heart.

第二点，我们之前讨论过元素周期表,我相信这是个标志性的特征,对于那些在21世纪里,用心去学习,元素周期表的人来说。

麻省理工公开课 - 固态化学导论课程节选

Of course, you can imagine the thoughts of Louis XVI as they were cutting back his hair to await the fall of the guillotine on the 21st of January, 1793.

你可以想象下在1793年1月21日这天,当人们拽住路易十六的头发,等待断头台下落时他会想些什么

耶鲁公开课 - 欧洲文明课程节选

For your readings, you are reading one of the meditations in my book, where I talk about it a little bit more in length, and I also gave the philosophical foundation, " because in many ways this goes against "counting and thinking" that has been so dominant in our 20th and 21st century thinking about morality.

你们正在读我书中的冥想部分，书中有更详细的阐述，也给出了哲学基础，因为在很多方面有别于“数数和思考“,那种方法在20和21世纪处于统治地位,思考道德。

哈佛公开课 - 幸福课课程节选

Wooly Willy It turns out these are really hard to find in the 21st century.

，Wooly，Willy？,在21世纪很难发现这些东西了。

哈佛公开课 - 计算机科学课程节选

And we can argue about whether or not that's work, but that has been the intention certainly in the 20th century and now 21st.

我们可以对这种现象有所争论，但这个观点,肯定是20世纪和现在21世纪的焦点。

普林斯顿公开课 - 人性课程节选