But a single water molecule in ice will have more molecules hydrogen bonded to it than in liquid water.

但冰中的单个水分子将比液态水中具有更多的氢键分子。

It's known as hydrogen bonding — a single molecule in liquid water will only be hydrogen bonded to a few other water molecules.

这被称为氢键 —— 液态水中的单个分子只会通过氢键与其他一些水分子结合。

And so in this case, we have a very electronegative atom, hydrogen, bonded-- oxygen, I should say-- bonded to hydrogen.

所以在这种情况下，我们有一个非常负电的原子，氢，键合——氧，我应该说——键合到氢上。

It replaced one of salicylic acid's hydroxyl group — that's an oxygen and hydrogen bonded to a carbon — with an acetyl group, which is two carbons, one double-bonded to an oxygen and the other bonded to three hydrogens.

它用乙酰基取代了水杨酸的一个羟基——氧和氢与碳结合——乙酰基是两个碳，一个与氧双键结合，另一个与三个氢结合。