postmastoid

例句：

1. 1. The postmastoid process is a key structure in the human skull that helps support the brain.
   后颅骨突起是人头骨中支撑大脑的关键结构。
2. 2.During surgery, the surgeon carefully dissects the postmastoid to access the brain.
   在手术过程中，外科医生小心翼翼地分离后颅骨以进入大脑。
3. 3.Postmastoid fractures are common in children and can be treated with a cast or plate.
   后颅骨骨折在儿童中很常见，可以通过石膏或钢板进行治疗。