It's much more fun traveling by train than by air.
It's much more fun traveling by train than by air.
乘火车旅行比乘飞机旅行有趣多了。fun的比较级有点特殊，为more fun。more是变形需要，而much是来修饰more fun这个比较级的，意为“有趣的多”。
much和more都是用来修饰比较级的
