Nowhere in the Old or New Testament do we find the institution condemned, but frequently recognized and enforced."

我们在旧约和新约中都没有发现,奴隶制被谴责,相反的,它频繁地得到认可并强制执行"

耶鲁公开课 - 美国内战与重建课程节选

Are we saying that until 1774 there was no oxygen because it was discovered then?

我们是说，直到1774年才出现的氧,是因为它被发现了？

麻省理工公开课 - 固态化学导论课程节选

that the negative particle travelled - it was deflected much, much further by those plates, what he could also assume and make the conclusion of is that the mass of that negative particle is actually larger or smaller?

因为他发现负电粒子,运动了很远,它被两块电板偏转了,非常非常远,所以他给出的结论是,负电粒子的质量,是比较大还是比较小？

麻省理工公开课 - 化学原理课程节选

Although, I said, insurance was effectively discovered or invented in the 1600s, it has been slow to grow because they didn't have the well-defined-- all of the inventions yet.

尽管我说过，保险实际上,是在17世纪的时候被发现或者发明的，但它的发展非常缓慢,因为人们无法确切定义-,这种被发明出的东西。

耶鲁公开课 - 金融市场课程节选

DNA is a double helix, you know this, the double helix was--the structure of DNA was discovered about the time that I was born you've always lived with it.

NA是双螺旋结构,众所周知,DNA的这种双螺旋结构,是在我出生的那个年代才被发现的,它就是你生命的一部分

耶鲁公开课 - 生物医学工程探索课程节选

It turns out that we are far from the first people, although it felt exciting, we did not discover this for the first time here today. In fact, J.J. Balmer, JJ Balmer who was a school teacher in the 1800s, was the first to describe these lines that could be seen from hydrogen.

实际上，它第一次被发现已经是在很早之前了，虽然我们觉得很激动，但我们,并不是第一次发现这个的，事实上，一个19世纪的老师,是第一个在氢原子中发现这些谱线的人。

麻省理工公开课 - 化学原理课程节选

So what actually turns out the reality is that h e 2 does exist, but it exists as the weakest chemical bond known, and it wasn't, in fact, even found to exist until 1993, so I can assure you this is not a bond that you see very often in nature, and it is a very, very weak bond.

实际上He2键是存在的，但它是目前所知的最弱的键，直到1993年它才被发现，所以我可以向你们保证在,自然界你们不可能经常看到它，它是种非常非常弱得键。

麻省理工公开课 - 化学原理课程节选