英语语法分析

You are saying the parchment was basically recycled?

你是说羊皮纸基本上是循环利用的？

So the pages, the pieces of parchment themselves, had been preserved.

所以这些纸，这些羊皮纸本身，被保存了下来。

During the 1400s, when printing was being developed, paper became the predominant material for books in Europe, but prior to that, it was parchment.

在15世纪，印刷术得到发展，纸张成为欧洲书籍的主要材料，在此之前的主要材料是羊皮纸。