颅腔是指由头部的皮肤、肌肉和8块脑颅骨（额骨1、顶骨2、蝶骨1、枕骨1、筛骨1、颞骨2）围成的腔。
相反，它们不是在北极熊的颅腔上发育的。
On the contrary, they are not developed on the endocast of the polar bear.
克里斯托弗颅腔底部的脊柱折断了，颈部以下瘫痪。
Christopher had broken his spinal cord near the base of his skull, resulting in paralysis from the neck down.
目的：探讨重型颅腔损伤气管切开术后肺部感染的预防和治疗。
Objective: to evaluate the treatment for pulmonary infection after tracheotomy in patients with severe head injury.
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