osteopethy

例句：

1. 1. The bones are visible through the skin.
   骨头可以通过皮肤看到。
2. 2. The doctor advised him to take calcium supplements for his osteoporosis.
   医生建议他为了他的骨质疏松症服用钙补充剂。
3. 3. Osteoporosis is a condition in which bones become weak and brittle.
   骨质疏松是一种疾病，其中骨头变得脆弱和易碎。