常见例句Ropivacaine and Fentanyl Concentrations in Patient-Controlled Epidural Analgesia During Labor: A Volume-Range Study Jean-Marc Bernard, Daniel Le Roux, and Jacques Frouin 分娩时病人自控硬膜外镇痛中的罗哌卡因和芬太尼浓度:容量范围研究 返回 Frouin