if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.

如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。

麻省理工公开课 - 化学原理课程节选

You are allowed to use on the test the official version of the Periodic Table of the Elements which most of you should have by now.

在测试中你们可以使用,化学元素周期表的官方版本,你们应该大部分都有了吧。

麻省理工公开课 - 固态化学导论课程节选

So hopefully, it was a time issue in terms of looking at the periodic table, because let's have you tell me what are we looking for here?

希望刚才大家出问题的原因,是因为看周期表有时间限制，请大家告诉我,我们在这里找什么？

麻省理工公开课 - 化学原理课程节选

Here is as pacemaker and this pacemaker does the same thing that a heart pacemaker does, it generates periodic electrical signals.

它和心脏起搏器发挥的作用相似,发出周期性的电信号

耶鲁公开课 - 生物医学工程探索课程节选

Relative to the whole market, It's well known that over periods of multiple decades the market has a tendency to go up.

是和整个市场相关的对吗，我们都知道经过几十年的时间周期,市场会有上涨的倾向。

麻省理工公开课 - 计算机科学及编程导论课程节选

I don't think the housing industry, in general,is a good place to be because of its, sometimes,violent cyclicality.

我认为总的来说住房工业,不是一个好的投资品种,因为它时常有着强烈的周期性

耶鲁公开课 - 金融市场课程节选

The how long will it take you diets?

还有关于节食周期的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If you look on the Periodic Table this is 598 atomic hydrogen. And, sure enough, there is 13.598, which is this number here in electron volts.

如果你查找元素周期表上的氢原子,毫无疑问，它的电离能就是13。,这个数值也是电子伏的值。

麻省理工公开课 - 固态化学导论课程节选

It is just down the hall from this lecture theater. And you bring the Periodic Table and the Table of Constants and a calculator and something to write with.

就在这件教室下面的大厅那,你们带上元素周期表和常数表,还有一个计算器和一些写的东西。

麻省理工公开课 - 固态化学导论课程节选

Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

耶鲁公开课 - 生物医学工程探索课程节选

And there's a lot we can explain by talking about what we see in the periodic table in terms of what different trends are in grouping different elements in different spots within the periodic table.

我们可以解释很多,通过讨论元素,周期表中的内容,按照各种不同的规律,将周期表中不同位置的元素分组归类。

麻省理工公开课 - 化学原理课程节选

Finally, getting it right to keep inflation low, keep that boom-bust cycle from coming back like it did, and you don't have to go, even go back so far period.

最终可以维持低通胀，打破繁荣与萧条的周期循环，这个已有先例，远的不说。

斯坦福公开课 - 经济学课程节选

So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.

不像水或者空气密度的,周期变化，我们这里,讨论的是电场。

麻省理工公开课 - 化学原理课程节选

So as we go across the row, and this is my beautiful picture of a periodic table here.

那么当我们沿着行向右走的时候，这是我漂亮的元素周期表。

麻省理工公开课 - 化学原理课程节选

And we know as we go across a row in the periodic table, what's happening is that z effective or the effective pull on the nucleus is increasing.

而我们知道沿着周期表的某一行向右看，有效核电量,或者说原子核的有效引力是在逐渐增大的。

麻省理工公开课 - 化学原理课程节选

You can keep people alive for many decades with periodic dialysis to remove waste products from the blood.

通过周期性的透析除去血液中的代谢废物,可以使病人寿命延长几十年

耶鲁公开课 - 生物医学工程探索课程节选

So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.

我们的新主题上，我们将会讨论一点关于元素周期表的知识，同时也会讲一讲周期性规律。

麻省理工公开课 - 化学原理课程节选

The period of table's on the back page of your notes if you don't see that there.

元素周期表在你们讲义的封底,如果你没看到的话。

麻省理工公开课 - 化学原理课程节选

The one problem that we run into is as we go to more and more atoms on the table, as we add on electrons, the Schrodinger equation is going to get more complicated.

我们将会遇到的一个问题,是当我们处理周期表中越来越多的原子时，当我们增加了电子，薛定谔方程,变得愈加复杂。

麻省理工公开课 - 化学原理课程节选

And then, just so that you will be literate in the rest of the Periodic Table, if you look at the higher ones, this is how you name them.

然后，你对周期表的,其他方面也都知道了，如果你观察高一点的元素，这是你们叫它们的方式。

麻省理工公开课 - 固态化学导论课程节选

Let me go back and finish up today by talking about the lifecycle of a virus.

让我回到病毒的生命周期这一话题,并以此作为今天的结尾

耶鲁公开课 - 生物医学工程探索课程节选

And now we're asking you to look at krypton, so the atomic mass is 36. You can actually just grab that handout the second handout on the exam and look at the periodic table there. So, which of the following ions listed is isoelectronic with krypton?

现在我们请大家来看一下氪原子，它的原子量是，36，大家其实可以拿出这张讲义,第二份关于考试的讲义,看一下上面的周期表，那么，下列离子中，哪一个是与氪原子是等电子的？

麻省理工公开课 - 化学原理课程节选

Mitosis is one event that happens during this larger event called the cell cycle.

有丝分裂就是发生在,较大的细胞周期中的一个小一点的环节

耶鲁公开课 - 生物医学工程探索课程节选

Some small subsets do but most of the cells in your brain don't proliferate and that's because they get trapped at one portion of the cell cycle.

除了很小一部分以外大部分脑细胞不增殖,这是因为,它们停滞于细胞周期的某个阶段

耶鲁公开课 - 生物医学工程探索课程节选

Again, this is a highly simplified version of the lifecycle of a virus.

再看一下,这是一个高度简化版的,病毒生命周期示意图

耶鲁公开课 - 生物医学工程探索课程节选

If cells were actively proliferating, that is you had a population of cells that are actively proliferating, they would be going through continuous rounds of the cell cycle.

如果细胞处在活跃增殖状态,就是说有一定数量的,细胞具有增殖活性,它们就会连续地经历细胞周期的各个阶段

耶鲁公开课 - 生物医学工程探索课程节选

So, this is what it's going to look like.

这就是元素周期表看上去的样子。

麻省理工公开课 - 固态化学导论课程节选