petrous

医生通过CT扫描检查了他的颞骨岩部。

The doctor examined his ___petrous temporal bone through a CT scan.

切除肿瘤需要小心地钻穿颞骨的岩部。

Removing the tumor required carefully drilling through the ___petrous portion of the temporal bone.

考古学家从中世纪头骨特别致密的岩部骨骼中提取了古代DNA。

Archaeologists extracted ancient DNA from the exceptionally dense ___petrous bone of a medieval skull.