Steroids are small molecules - much smaller than proteins - smaller molecules that tend to be hydrophobic or lipid soluble.

类固醇是小分子物质,比蛋白质小得多,这类小分子是非水溶性的,或者说是脂溶性的

耶鲁公开课 - 生物医学工程探索课程节选

So, if we look at the molecular orbital, that's actually going to be lower in energy than either of the two atomic orbitals.

如果我们看分子轨道的话，它实际上要比,两个原子轨道都要低。

麻省理工公开课 - 化学原理课程节选

Higher entropy basically because you're forming molecules of gas where there weren't any before, and there's more disorder in the gas phase than in the liquid. That is, the gas phase molecules have more freedom to roam.

高的熵是因为,我们产生了以前不存在的气体分子,气体的无序程度比液体大，换句话说,气相的分子，有更多的到处游荡的自由度。

麻省理工公开课 - 热力学与动力学课程节选

And what you can see directly from looking at this energy level diagram, is that the molecule that we have is now more stable in the individual atoms.

你从直接看,能级图中会发现，分子比单个的,原子能量更低。

麻省理工公开课 - 化学原理课程节选

So, in general what we see, and this is always true if we're comparing the same atom, and in general, if we're comparing different types of molecules, but we know that a single bond is always weaker than a double bond, which is weaker than a triple bond.

通常我们会看到，这对比较相同原子来说总是正确的，通常，如果我们要比较不同种类的分子，但我们知道单键,总是要比双键弱，双键总是要比三键弱。

麻省理工公开课 - 化学原理课程节选

now we're dealing with a lot of different atoms in the molecule, much more complicated than the initial case of the cyanide ion where we only had two.

现在我们要面对的分子中有很多不同的原子，比我们一开始只有两个,原子的氰离子复杂多了。

麻省理工公开课 - 化学原理课程节选

So we'll start to look at molecules and we'll see if we take two atoms and we fill in our molecular orbital and it turns out that they have more anti-bonding orbitals than bonding, that's -- a diatomic molecule we'll never see.

我们要看开始看一看分子,并且我们会发现如果我们,取两个原子并且填入分子轨道,结果是它们的反键轨道,比成键轨道更多，这就是-一个我们不会看到的二元子分子。

麻省理工公开课 - 化学原理课程节选

So we're going to finish talking about molecular orbital theory, we'll switch over to discussing bonding in larger molecules, even larger than diatomic, so we'll move on to talking about valence bond theory and hybridization.

我们要结束关于分子轨道理论的讨论，转向讨论大分子的成键，比二原子分子更大的分子，我们会继续讨论价电子成键理论,和杂化。

麻省理工公开课 - 化学原理课程节选

So what we see is on ammonia here, 107 we know that it's less than a 109 . 5, it's actually 107, so it's less than a 109 . 5, because of that lone pair pushing down in the bonding electrons.

我们看到在氨分子里，我们知道它比１０９．５要小，它是，所以比109。5要小，因为孤对会把成键电子向下推。

麻省理工公开课 - 化学原理课程节选

If z is greater than 1, then the real gas means that the atoms and molecules in the real gas are repelling each other and wants to have a bigger volume.

如果Z大于,说明实际气体的分子间斥力较强,体积比理想气体要大,我们可以查表找到。

麻省理工公开课 - 热力学与动力学课程节选

So the real pressure is not quite the same because of this attractive force as it was, as it would be without the attractive forces.

气体压强,由于分子间的吸引作用,会比理想气体要小,这样，我们应该修正p的值。

麻省理工公开课 - 热力学与动力学课程节选