Well, it turns out biology has this other very interesting meme, that you can take a linear string, which is a convenient thing to copy, and you can fold that into an arbitrarily complex 3D structure.
因为生物有个特性 你拿一个 线性的一串细胞，它可以很容易实现复制 你可以将它折叠成复杂的三维结构