Keratoprotein constitutes hair, nail, feather, silk and cobweb.
角质蛋白构
、
、
、蚕丝及蛛网。
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Science and technology Crash Course A sheet of particles like the proteins that make up silk is a more sophisticated kind of network because the particles are connected on all sides, but its connections are still two-dimensional so it's only stronger in those directions.
像构成蚕丝的蛋
质
样的粒
薄片是一种更复杂的网络固体，因为些粒
相连，但其连接仍然是二维的， 所以它只在那些方向上更强。
