【英语时差8,16】骨质疏松（上）（在线收听）

Osteoporosis literally means porous bone. It is characterized by loss of bone density and the deterioration of bone tissue, which makes bones fragile and more likely to fracture. The important thing about osteoporosis is figuring out whether you’ve got it before you injure yourself. And that’s pretty easy to do: there’s a specialized test that measures bone density, and based on its results, doctors can prescribe various medications to slow the disease down.