parchment is a durable,much more so than paper

在你的句子裏面,much more so than paper==much more DURABLE than paper
又如：
Tom is very tall,much more so than any other boy here.==== Tom is very tall,and he is much TALLER than any other boy here.
so ==某一个形容词

行动胜于纸上谈兵

口语：
Parchment is a durable material. It is much more durable than paper.