Your bones are continuously changing - new bone is made and old bone is broken down.

你的骨骼在不断地发生变化——新骨头被制造出来，旧的被破坏掉。

youdao

Your bones are continuously changing - new bone is made and old bone is broken down.

你的骨骼在不断地发生变化——新骨头被制造出来，旧的被破坏掉。

youdao