我复习有机化学时说的一些话：
On the acid (molecule) cracks OH.
On the alcohol cracks H.

Now look at the following reaction.
At first this double bond cracks and form 2 new single bonds, one of which is held out and the other is connected to here....

If between the carbon atoms is a triple bond, it is turned into a double bond, not a single bond when reacting with sodium hydroxide.

If water isn't formed, the catalyst is water. Otherwise it is alcohol.

上面的句子都是我那天晚上用嘴直接说的