But now let's think about this on the molecular level — water is a polar molecule.

但现在让我们在分子层面上思考这个问题 —— 水是极性分子。

So acetone is a relatively polar molecule.

所以丙酮是一种相对极性的分子。

And so we say that this is a polar molecule.

所以我们说这是一个极性分子。

So this is a polar molecule as well.

所以这也是一个极性分子。

And so this is a polar molecule.

所以这是一个极性分子。

Well, hydrogen peroxide is a polar molecule so it dissolves really well in water.

好吧，过氧化氢是一种极性分子， 因此它在水中的溶解度非常好。

Of course, water is a polar molecule.

当然，水是极性分子。

Water is a polar molecule, which means that it has a slight charge to it.

水是极性分子，这意味着它带有轻微的电荷。

Those are our polar molecules, the asymmetrical beauties of chemistry.

那些是我们的极性分子，化学的不对称之美。

This isn't what we're talking about here when we talk about polar molecules.

当我们谈论极性分子时，这不是我们在这里谈论的。

I think polar molecules are way more interesting, despite their wonky, off-balance selves.

我认为极性分子更有趣，尽管它们不稳定、失去平衡。

To help understand this, remember that glucose is a polar molecule that cannot passively diffuse across cell membranes, which means that it acts as a solute.

想要了解这个原理，要记得葡萄糖是极性分子，不能被动穿过细胞膜，这意味着它是作为一种溶质。

Liquids made up of polar molecules are really good at dissolving solids that are composed of polar or ionic compounds.

由极性分子组成的液体非常擅长溶解由极性或离子化合物组成的固体。

But also because it's polar; it's a very polar molecule Remember how I said that oxygen is very good at pulling electrons toward it?

但也因为它是极性的；这是一个非常极性的分子还记得我说过氧气非常善于将电子拉向它吗？

If that's the case, the outer electrons spend enough extra time around the element that's more electronegative that chemists label the molecule polar.

如果是这样的话，外层电子会在电负性更强的元素周围花费足够多的时间， 以至于化学家将分子标记为极性。

Because water is a polar molecule, and the various chemicals that make up butter are non-polar, and water wants nothing to do with that.

因为水是一种极性分子，而构成黄油的各种化学物质都是非极性的， 而水与此无关。

Now if you put polar stuff in, water is all about that, and those polar water molecules just go after whatever other partial charges they can find.

现在，如果你把极性物质放进去，水就是全部，那些极性水分子只会追逐它们能找到的任何其他部分电荷。

Then, there's hydrogen bonding, a special type of dipole-dipole force, one that occurs on polar molecules that contain hydrogen and a strongly electronegative element such as nitrogen, oxygen, or fluorine.

然后是氢键，一种特殊类型的偶极-偶极力，发生在含有氢和强电负性元素（如氮、氧或氟）的极性分子上。

As you should recall from our lesson on polar and non-polar molecules, a dipole is a separation of charges, like areas of partial positive and partial negative in a polar molecule such as water.

你应该记得我们关于极性和非极性分子的课程， 偶极子是电荷的分离，就像极性分子（如水）中的部分正和部分负区域一样。

You can't have a polar molecule made up entirely of the same element because those atoms will all have the same electronegativity, and thus the electron distribution will be completely symmetrical.

极性分子不可能完全由相同的元素组成，因为这些原子都具有相同的电负性，因此电子分布将完全对称。