And this one is called London dispersion forces.

而这个被称为伦敦分散力量。

The only intermolecular force that's holding two methane molecules together would be London dispersion forces.

唯一将两个甲烷分子结合在一起的分子间力是伦敦色散力。

It's very weak, which is why London dispersion forces are the weakest intermolecular forces.

它非常弱，这就是为什么伦敦色散力是最弱的分子间力。

The first is called " London dispersion forces, " which are most common in London.

第一种称为“伦敦分散力量”，在伦敦最为常见。

And we should all remember the lesson of London dispersion forces: small, weak things can have important jobs, too!

我们都应该记住伦敦分散力量的教训：小而弱的东西也可以有重要的工作！

If you paid attention, you learned that intermolecular forces, including London dispersion forces, dipole-dipole forces, and hydrogen bonds attract molecules to each other, especially in solids and liquids.

如果您留心观察， 您就会了解到分子间作用力，包括伦敦色散力、偶极-偶极力和氢键，会相互吸引分子， 尤其是在固体和液体中。

London dispersion forces are the only thing that makes non-polar substances like methane and even otherwise non-reactive stuff like helium stick together well enough to condense from gases into liquids.

伦敦分散力是唯一使非极性物质（如甲烷）甚至是非反应性物质（如氦）粘在一起足以从气体凝结成液体的唯一因素。

And it's not that London dispersion forces are especially strong in these substances, it's just that there's nothing else holding them together, so even these tiny forces are noticeable in them.

并不是说伦敦色散力在这些物质中特别强大，只是没有其他东西将它们结合在一起， 所以即使是这些微小的力在它们中也很明显。

And so even though London dispersion forces are the weakest, if you have larger molecules and you sum up all those extra forces, it can actually turn out to be rather significant when you're working with larger molecules.

因此，即使伦敦色散力最弱，如果你有更大的分子， 并且你将所有这些额外的力加起来， 当你处理更大的分子时， 它实际上会变得相当重要。