"All these elements who were training there, who were stationed there, are out of the place and could be acting independently,".

VOA: standard.2009.12.09

Which means that these elements are very good electron donors.

意味着,这些元素是非常好的电子给体。

麻省理工公开课 - 固态化学导论课程节选

OK, elements with low average valence electron energy, and here I'm saying below 11 electron volts, these are good electron donors.

平均价电子能都较低的元素，我是指那些低于11电子伏的，这些是很好的电子给体。

麻省理工公开课 - 固态化学导论课程节选

It does not mean we should not make them, it does not mean that there are not younger and more reformist elements or pragmatic elements in most of these regimes that we can engage."

VOA: standard.2010.05.19

These are sort of the cells, if you like, in memory that are holding the elements of the list.

记忆就像是数组中的元素,我们之前说的是，我在这里开始并且比较。

麻省理工公开课 - 计算机科学及编程导论课程节选

And all we are competent therefore to decoil pose and recoil pose these elements of learning, so that we are still consistent with all those purposes, both explicate and implicit, of an educational environment.

我们可以,单独和综合呈现,这些学习的要素，所以我们仍然与,教育环境的目标一致，包括表层目标深层目标。

麻省理工公开课 - 媒体、教育、市场课程节选

So if we consider lithium, potassium, and sodium, they're all together in the same group on the periodic table, knowing what we do about biology we can immediately think of sodium and potassium, or even just knowing what you know about table salt, for example, that these are two elements that we find, and particularly in the ion form in very high concentrations in our body.

我们来考虑一下锂，钾和钠，它们都在周期表中的同一族里，想要知道我们将元素周期律,用到生物学会怎么样，我们首先想到的就是钠和钾，甚至只需要知道食盐，我们发现它们是以很高浓度的离子形式,存在于我们体内的两种元素。

麻省理工公开课 - 化学原理课程节选

Now if you read in the book, you read about where this figure is shown in the book, you can understand more about why these structures line up in the right way so that the right molecular elements are together to form hydrogen bonding pairs between them.

如果你预习过课本,课本中有关于这些详细的描述,你可以更深刻的理解,为什么这些结构是采用这种连接方式,以使对应的分子部分靠近,并形成氢键连接

耶鲁公开课 - 生物医学工程探索课程节选

These are elements that have yet to be isolated These are elements that are unstable.

这些元素还没有被提取出来,这些元素很不稳定。

麻省理工公开课 - 固态化学导论课程节选

These are elements that are good electron donors.

这些元素是很好的电子给体。

麻省理工公开课 - 固态化学导论课程节选

By the time of the American Revolution these are the elements that were known.

到了美国革命的时候,这些元素都已知了。

麻省理工公开课 - 固态化学导论课程节选

Elements beyond uranium, these are synthetic.

铀元素之后的元素，是人工合成的。

麻省理工公开课 - 固态化学导论课程节选

Now these are the 3d elements.

这些就是3d元素。

麻省理工公开课 - 固态化学导论课程节选

So, when the value of the average valence electron energy lies between 11 eV and 13 eV, we have these elements that are neither fish nor fowl, and you'll see in a little bit their unique electrical properties.

所以，当平均价电子能,在11eV到13eV之间时，这些元素介于金属和非金属之间，你们将进一步,看到它们独特的电性质。

麻省理工公开课 - 固态化学导论课程节选