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

而大约99%钙在我们骼中以磷酸钙存在，也被叫做羟基磷石。

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做羟基磷石矿物制成。

It does this by stimulating osteoclasts, the cells that break bone down, to release hydrogen ions which dissolves the hard, mineralized hydroxyapatite.

甲状旁腺激素通过刺激破细胞来释放氢离子；破细胞是一种骼细胞，可溶坚硬矿化羟基磷石。

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%磷酸盐储存在骼中，它在骼与钙结合成一种叫做羟基磷石坚硬化合物，这是为什么头比较坚硬原因。

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，由一种叫做羟基磷石无机材料制成，这种材料在压缩时是坚硬，与一种叫做胶原蛋白柔性蛋白质结合在一起，可以防止你粉碎。