Speaking of supramolecular polymer networks, and no, I'm not kidding.

说到超分子聚合物网络，我并没有开玩笑。

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。