它们要求获得最后的客房的使用权，这意味着，无论市场形势如何，如果我们不按照折扣价给它们提供最后一间客房，那我们就不能满足他们的要求。

They demanded last room availability, meaning regardless of strength of market, if we don’t expose the last room to them at that discounted price, we are not in good standing.

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即便出价太低、达不到保留价的水平，它们也能达到一个重要目的——安抚出价方，让他们知道其他人也感兴趣。

Even though the bids are too low to beat the reserve, they serve an important purpose of reassuring bidders that others are also interested.

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有些事物之有主观的使用价値，是因为人们误信它们有发生他所想望的效果的能力。

There are things to which subjective use-value is attached because people erroneously believe that they have the power to bring about a desired effect.

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So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.

我们可以想象比较一下钾离子,与钠离子，它们都同样带有正一价的电荷。

麻省理工公开课 - 化学原理课程节选

It's 109 . 5 is what we would expect for methane because it's tetravalent, but here we're just seeing something that's divalent, and they're both in p orbitals that are perpendicular to each other.

因为甲烷是四价的，我们预测是109。,但这里我们，看到的是二价的，它们都在。

麻省理工公开课 - 化学原理课程节选

And this is just a picture showing some of these sizes with their parent. So, for example, a lithium here, you can see how lithium plus is smaller than the actual lithium atom in its neutral state.

这是一张对比图,展示某些离子与它们的母体，比如，这里是锂，大家可以看到正一价锂离子是多么的小,与中性锂原子相比。

麻省理工公开课 - 化学原理课程节选