SPNs do often contain conventional polymers that are held together by covalent bonds.

SPN通常含有由共价键连接在一起的普通聚合物。

That temporariness gives SPNs all kinds of special properties.

这种短暂性让SPN有了各种特殊的属性。

The hydrogel is part of a class of materials known as supramolecular polymer networks, or SPNs.

这种水凝胶属于一种被称为超分子聚合物网络(SPN)的材料。

But polymers within the SPN are crosslinked by more transient intermolecular forces, such as hydrogen bonding.

但SPN内部的聚合物则更多是由瞬态分子间作用力交联的，例如氢键。

The hypothesis was that longer-lasting bonds would nudge the SPN towards a state that is more resistant to any forces applied to it.

他们假设持续时间更长的化学键会促使SPN对施加在其上的任何作用力都更具有抵抗力。

But once they made contact with living tissue, the fibers bonded to each other to form a gel-like SPN that mimicked the normal scaffolding around the cells of the spinal cord.

但它们一旦与活组织接触，纤维就会相互粘合形成一种凝胶状的SPN，从而模仿脊髓细胞周围的正常支架。

But the weak bonds of the fibers' SPN meant that even once they were assembled into their extracellular scaffolding, the fibers continued to move slightly, sometimes even escaping the network.

但纤维SPN的化学键很弱，这意味着即使它们被聚集到细胞外支架中，纤维也会继续轻微移动，甚至有时会逸出网状结构。