常見(jiàn)例句雙語(yǔ)例句The inner ear is a closed system surrounded and protected by the petrous portion of the temporal bone.內(nèi)耳是一個(gè)受到顳骨堅(jiān)硬部分包圍和保護(hù)的封閉系統(tǒng)。 返回 petrous portion