noun 下载 🔗分享 骶动脉 Sacral artery Examples : "The doctor checked the blood flow in the sacra to ensure proper circulation in the lower back. " 医生检查了骶动脉的血流情况，以确保下背部的血液循环正常。 anatomy organ body medicine 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 骶骨 A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood. Examples : "The doctor explained that the patient's lower back pain could be related to a misalignment of the sacra. " 医生解释说，病人下背部的疼痛可能与骶骨错位有关。 anatomy body medicine physiology structure part organ 与AI对话词汇游戏阅读练习
