I know table salt is white, but that is because you have power and you have multiple surfaces scattering, but a large crystal of sodium chloride is clear and colorless.

我知道食用盐是白色的，但这是因为你让它成了粉末,因为有了多个散射面，但是一个大的氯化钠晶体,是无色透明的。

麻省理工公开课 - 固态化学导论课程节选

I've just come from the Heath. A friend was over from Rome, so we caught up today.

我刚从希思公园过来。一个来自罗马的朋友过来了，我们今天碰了面。

怡人的的汉普斯特德 - SpeakingMax英语口语达人

in the last couple lectures at a really important topic in thermodynamics.

在前面几次课里,面我们考察了热力学中一个很重要的课题。

麻省理工公开课 - 热力学与动力学课程节选

If what we mean is the mental, but that the aspect, the behavioral aspect of the mental, where even a chess-playing computer probably has it, then that's not a very compelling argument.

如果我们说的是精神的某个方面,即精神的表现面,是一个甚至连象棋程序都可能拥有的方面,那这就不是一个令人信服的论点

耶鲁公开课 - 死亡课程节选

So that you take every sodium and you count all of its nearest neighbors, next nearest neighbors, next next nearest neighbors, not only on a line but in the plane and above and below in all three dimensions and go through that calculation, it is even more negative.

你考虑到每一个钠原子,你要考虑到它最近的原子，第二近的原子，第三近的原子，不是在一条线而是在一个面上,以及面上与面下的三维空间,再完成计算，这将会更负。

麻省理工公开课 - 固态化学导论课程节选

So again, we can name these molecular orbitals and these we're going to call also to point out there is now a bond axis along this nodal plane, which is something we didn't see before when we were combining the s orbitals.

同样的，我们可以,命名这些分子轨道,这些轨道叫做-同样要指出的是,现在沿着键轴是一个节点面，这是我们讨论s轨道的时候,从没有看到过的。

麻省理工公开课 - 化学原理课程节选

They took a crystal, this is a single crystal of nickel that has regular planes of atoms, and those planes are spaced on the order of an angstrom or less apart, and they irradiated this with x-rays.

他们取了个晶体,一个具有规则原子平面的，镍晶体,这些面间距差不多也是一埃或者更少，它们放射出X射线。

麻省理工公开课 - 固态化学导论课程节选