head joint

例句：

1. 1. The doctor examinedthe patient's head joints carefully.
   医生仔细检查了患者的头关节。
2. 2. Theteam worked together to fix the head joints of the car.
   团队共同努力修复了汽车的头关节。
3. 3. The scientist discovered anew method to repair the head jointsof an old machine.
   科学家发现了一种新的方法来修复一台旧机器的头关节。