arthragra

例句：

1. 1. The doctor examined the patient's joints carefully.
   医生仔细检查了患者的关节。
2. 2.The team practiced their joint movements during the break.
   在休息时间，球队练习了他们的联合动作。
3. 3.The scientist discovered a new method to improve the efficiency of joint operations.
   科学家发现了一种新的方法来提高关节操作的效率。