lubricating elbow

例句：

1. 1.He used a lubricating elbow to help him open the door.
   他用润滑肘帮助他打开门。
2. 2. The doctor advised him to use a lubricating elbow for his back pain.
   医生建议他使用润滑肘来缓解背部疼痛。
3. 3.During the long drive, he applied the lubricating elbow to prevent his hands from getting sore.
   在漫长的驾驶过程中，他涂抹了润滑肘来防止手部起泡。