Moll joint

例句：

1. 1. The doctor advised him to have a moll joint replaced.
   医生建议他换掉一个关节。
2. 2.The scientist discovered a new way to join molls together.
   科学家发现了一种将多个关节连接在一起的新方法。
3. 3. The team successfully performed the moll joint operation on the injured player.
   团队成功地为受伤球员完成了关节置换手术。