And he actually did this in the late 1800's, back before even all of the elements that we know today were discovered, really only about 60% or so, 70% were discovered then that we now know today.

他最终在十九世纪晚期完成了这一壮举，难能可贵的是,虽然我们现在已经发现了所有的元素，但在当时已知的元素只有我们现在知道,百分之六七十，在这种情况下。

麻省理工公开课 - 化学原理课程节选

But I know today in my math class, we were learning about the guys who created RSA Public Key Cryptography.

但是今天的数学课上，我们在学习RSA公钥加密算法的创始人。

积极参与俱乐部活动 - SpeakingMax英语口语达人

So basically, at the time he was just going on size and then traits, but what we actually know today is that we can also order things in the periodic table by electron configuration.

基本上，在当时他只能通过大小,和特性来进行，但是现在我们已经知道了,我们还可以通过电子排布来对它们进行排序。

麻省理工公开课 - 化学原理课程节选

The difficulty with reading Machiavelli today is that we all think we already know what he knows and that is false.

今日阅读马奇亚维利的困难点,在于我们都认为我们早已知道,他所知道的东西，但那并不正确。

耶鲁公开课 - 政治哲学导论课程节选

And as an aside, those in the room who are among those more comfortable, even if we're not quite filling in blanks today, realize we will very quickly entice you with details that you don't already know.

说句题外话，你们中有一些,看起来聚精会神，实际上开小差的同学，也许我还不能对号入座，但这些人必须意识到，我会一笔带过,一些你们可能不懂的问题。

哈佛公开课 - 计算机科学课程节选

Yeah,so you know many many people have said or asked the question what are Americans objectives in Afghnastan today? What are they?

嗯，你知道很多人说或者问这个问题,美国在阿富汗的目标是什么？

普林斯顿公开课 - 国际座谈会课程节选

We know our brain today can actually change through MRI studies since 1998.

自1998年后通过核磁共振研究我们知道大脑可以被改变。

哈佛公开课 - 幸福课课程节选

What is it today? Does anyone know?

现在税率是多少呢,有人知道吗

耶鲁公开课 - 金融市场课程节选

The section when you do today is always the most popular section of the year, you'll know why after the section, and you can tell me afterwards if you think you figured out why.

今天你们要做的分组讨论,一直是每年最受欢迎的部分,讨论完了你们就明白了,如果你明白了的话,课后告诉我

耶鲁公开课 - 生物医学工程探索课程节选

So I don't really know who the basketball players are today, I really don't.

所以我真的不知道现在有哪些篮球队员了，我真的不知道。

现场观看篮球赛 - SpeakingMax英语口语达人

I don't know if it's possible to finish this by the end of today.

我不知道我们能不能在今天之内把这件事做完。

I don't know 课堂 - SpeakingMax英语口语达人

But we know this, in particular, from a series of studies that would be unethical if they were to be done today.

我们知道这点，是通过一系列的实验，出于人道精神,这些实验现在就不能做了。

耶鲁公开课 - 心理学导论课程节选

What we're talking about today is how we do know things. Right?

我们今天讲的就是怎样认识事物，对吧？

耶鲁公开课 - 文学理论导论课程节选

I don't know, what would a synonym today be for honor?

我也不知道,现在荣誉的同义词是什么

耶鲁公开课 - 美国内战与重建课程节选

as far as I know, this is it. Right now! Today, right now!

据我所知，就是这样。现在！今天，现在！

我的理想是 - SpeakingMax英语口语达人

And I just have to do this today on the Greco-Roman world, tell you everything you need to know about the Greco-Roman world, at least for this semester.

今天要讲的古希腊罗马时代，告诉你们所有需要了解的古希腊罗马知识，至少这学期需要了解的知识。

耶鲁公开课 - 新约课程节选

Please don't anybody tell me late - any time after today you didn't know when the mid-term was and therefore it clashes with 17 different things.

所以以后千万别跟我说,你不知道什么时候期中考试,然后还在考试那天安排大一堆事儿去做

耶鲁公开课 - 博弈论课程节选

This is what's called the Bohr radius, and we'll explain - hopefully we'll get to it today where this Bohr radius name comes from, but for now what you need to know is just that it's a constant, just treat it like a constant, and it turns out to be equal to or about 1/2 an angstrom.

它叫做玻尔半径，我们后面会解释,希望我们今天可以讲到,波尔半径这个名称的由来，但现在你们只要记住,它是一个常数，只要把它当做一个常数对待，它等于,或者是1/2埃。

麻省理工公开课 - 化学原理课程节选