double lip retaining ring

例句：

1. 1. The double lip retaining ringis a surgical tool used to repair damagedteeth.
   双唇保持环是一种用于修复受损牙齿的手术工具。
2. 2. The doublelip retaining ring wasdesigned to prevent the patient frombiting their tongue during sleep.
   双唇保持环的设计是为了在睡眠时防止患者咬到舌头。
3. 3. The doublelip retaining ring wasremoved after the surgery, andthe patient's mouth was bandaged for several days.
   手术后移除了双唇保持环，患者嘴巴被包扎了几天。