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

种矿物质大部分是羟磷灰石——它们非常坚硬而且富含钙质和磷酸盐。

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

而大约99%的钙在我们的骼中以磷酸钙的形式存在，也被叫羟基磷灰石。

The lamellae have an organic part, which is mostly collagen, and an inorganic part called hydroxyapatite, which is mostly calcium phosphate.

些薄片的有机部分主要是胶原蛋白，而无机部分称为羟磷灰石，其主要成分是磷酸钙。

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

甲状旁腺素通过刺细胞来释放氢离子；细胞是一种分解骼的细胞，可溶解坚硬的矿化羟基磷灰石。

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%的磷酸盐储存在骼中，它在骼与钙结合形成一种叫羟基磷灰石的坚硬化合物，是为什么头比较坚硬的原因。

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.

所有些身体部位大约 70% 是矿物质，由一种叫羟基磷灰石的无机材料制成，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。