Gartner's duct cyst of vagina

例句：

1. 1. The duct was blocked by a piece of debris.
   管道被一块碎片堵塞了。
2. 2. The engineer used a special duct to cool the engine.
   工程师使用一种特殊的管道来冷却发动机。
3. 3. The duct was removed and replaced with a new one.
   管道被移除并更换为一个新的。