The material typically used for the pages was parchment, which is animal skin that's stretched and dried under tension, so it become s really flat and can be written on.
书页通常使用的材料是羊皮纸，羊皮纸是一种动物的皮肤，其在张力的作用下被拉伸和变干，因此它会变得非常平整，并且你可以在上面写字。
The world it's said has shrunk or become flat.
人们都说世界正在不断地变小，变得平坦。
This example proves that such flat spaces around us in fact exist and that they become visible by electromagnetism, just generating turbulences on these coinciding dimensions.
这个例子证明我们周围的平面空间事实上是存在的，并在电磁场的作用下为我们所见，仅仅因为这些碰在一起的维度产生了扰动而已。
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