Now we only have two more oxygen-based functional groups that we're gonna talk about, These are groups that have internal oxygens bonded directly to carbons.

现在我们只讨论另外两个基于氧的官能团，这些是内部氧直接与碳键合的基团。

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。