So we're seeing here preserved is calcified cartilage and the orange band in the middle.

所以我们在这里看到保存下来的是钙化的软骨和中间的橙色带。

So along the edges you can see how bone actually uses what was left behind by the calcified cartilage as the scaffolding to build the primary bone on.

所以沿着边缘你可以看到骨骼实际上是如何使用钙化软骨留下的东西作为建造主要骨骼的脚手架。

We know we begin with calcified cartilage that will form into primary bone and then mature into secondary bone and then eventually develop into something called dense haversian bone.

我们知道我们从钙化软骨开始，它会形成初级骨，然后成熟为次级骨，最后发展成一种叫做致密哈弗斯骨的东西。