Definition: one of the hard pieces that make the structure inside a human or animal Level: B1
医生可以通过研究人类的骨骼学到很多东西。
Doctors can learn a lot from studying human ___bones.
狗把还粘着些肉的骨头埋了起来。
The dog buried the ___bone with some meat still attached.
博物馆展示了一块古老生物的骨骼化石。
The museum displayed the fossilized ___bone of an ancient creature.
