All of this from body parts that are about 70% mineral, made of an inorganic material called hydroxyapatite that is stiff when compressed, combined with flexible protein called collagen to keep you from shattering.

所有这些身体部位大约 70% 是矿物质，由一种叫灰石的无机材料制成，这种材料在压缩时是坚硬的，与一种叫胶原蛋白的柔性蛋白质结合在一起，可以防止你粉碎。

Anyways, about 99% of that calcium is in our bones in the form of calcium phosphate, also called hydroxyapatite.

而大约99%的钙在我们的骨骼中以酸钙的形式存在，也被叫灰石。

In the body, about 85% of the phosphate is stored in the bones, where it combines with calcium to make a tough compound called hydroxyapatite which is the stuff that makes bones hard.

在人体中，约85%的酸盐储存在骨骼中，它在骨骼与钙结合形成一种叫灰石的坚硬化合物，这是为什么骨头比较坚硬的原因。

But others pointed out that the fossils were made from a mineral called hydroxylapatite.

但其他人指出，这些化石是由一种叫灰石的矿物形成的。

This mineral is mostly hydroxyapatite – tough stuff that's rich in calcium and phosphate.

这种矿物主要是灰石 - - 一种富含钙和酸盐的坚硬物质。