dorsal sac

例句：

1. 1.The surgeon removed the dorsal sac and repaired the damaged tissue.
   外科医生切除了腹膜囊，并修复了受损的组织。
2. 2.During surgery, the dorsal sac is carefully inflated to stabilize the patient's position.
   手术期间，腹膜囊会被小心地充气以稳定患者的体位。
3. 3. The dorsal sac plays a crucial role in maintaining proper blood circulation.
   腹膜囊在保持正常血液循环中起着至关重要的作用。