The answer lies in a clever combination of intermolecular forces and stuctural engineering.

答案是分子之间作用力与结构工程巧妙结。

Cohesion means the strength of intermolecular forces that hold the material together.

内聚力指把物质结在一起分子间作用力强度。

They are used to help it grip to surfaces using intermolecular forces.

它们帮助壁虎抓住物体用分子间作用力。

But polymers within the SPN are crosslinked by more transient intermolecular forces, such as hydrogen bonding.

但SPN内部聚物则更多是由瞬态分子间作用力交联，氢键。

And the intermolecular force, in turn, depends on the electronegativity.

而分子间作用力又取决于电负性。

And it has to do with the intermolecular force of dipole-dipole interactions holding those molecules together.

这与偶极-偶极相互作用这种分子间作用力将这些分子结在一起有关。

Let's look at another intermolecular force, and this one's called hydrogen bonding.

让我们来看看另一种分子间作用力，这种作用力被称为氢键。

But since they have real weak intermolecular forces they're going to have a very low melting point.

但由于它们分子间作用力真很弱，所以熔点会非常低。

The intermolecular forces will hold them in place and then they will not vaporize into the air.

这些分子间作用力将它们固定在原位，使它们不会挥发到空气中。

And so you have table salt and that has very strong intermolecular forces, but it's not sticky.

因此，你拥有是食盐，它具有很强分子间力，但并不粘。

Here's your hydrogen showing intermolecular force here.

这里是你看到氢原子展示了分子间作用力。

It's just because of intermolecular forces.

这完全是因为分子间作用力缘故。

It's Mr. Andersen and this chemistry essentials video 18 on intermolecular forces, which are simply the forces between molecules.

这是安德森先生和这个化学基础视频18关于分子间力, 这只是分子之间力。

The intermolecular forces between that is what causes them to be close to one another.

分子间力是导致它们彼此靠近原因。

May the intermolecular forces be with you.

愿分子间力与你同在。

And so intermolecular forces are important because they give us the properties of solids and liquids and gases.

所以分子间作用力很重要, 因为它们赋予我们固体、液体和气体特性。

And in gases there's not too many intermolecular forces because they're moving around really really quickly.

而在气体中, 分子间作用力并不多, 因为它们移动得非常非常快。

Um, intermolecular forces are, all they are is the forces between two molecules.

嗯，分子间力，其实就是两个分子之间力。

Let's look at another intermolecular force.

让我们来看看另一种分子间作用力。

And then finally intermolecular forces are incredibly important in biology.

最后，分子间力在生物学中极其重要。