crania

例句：

1. 1. The skull of the ancient dinosaur is a fascinating fossil.
   古代恐龙的头骨是一个引人入胜的化石。
2. 2. The skullcap protects the forehead from injury.
   头骨帽保护前额免受伤害。
3. 3. The skull fragments are scattered all over the floor.
   头骨碎片散落在地板上。