Synchondroses craniales

例句：

1. 1.The skull is the first part of the human body to develop.
   颅骨是人体最早发育的部分。
2. 2.The skull has a complex structure that supports the brain.
   颅骨具有复杂的结构，支撑着大脑。
3. 3. Skull fractures are common injuries in sports.
   颅骨骨折是体育运动中常见的伤害。