mastoid border

例句：

1. 1. The radiologist carefully examined the mastoid border to determine the extent of the bone damage.
   放射学家仔细检查了乳突边界，以确定骨损伤的程度。
2. 2. During surgery, the surgeon made a precise incision just above the mastoid border to access the brain tissue.
   在手术中，外科医生精确地在乳突边界上方切开，以便接触到脑组织。
3. 3. The patient's condition worsened as the mastoid border was breached, necessitating immediate intervention.
   随着乳突边界被破坏，患者的病情恶化，需要立即干预。