— used to give added force to a word like “more” or “better”用于修饰more或better以加强语气
With the economy in such bad shape, it's all the more important [=it's even more important] that we correct these problems quickly.鉴于经济形势如此之差，当务之急是我们尽快改正这些问题。
If we arrive early, all the better. [=it will be even better if we arrive early]如果我们能早到，那当然更好。