指关节骨

例句：

1. 1. He had to dislocate his shoulder joint to play basketball.
   他不得不脱臼肩膀才能打篮球。
2. 2. The scientist studied the structure of the human skeletal system.
   这位科学家研究了人类的骨骼系统结构。
3. 3. The doctor advised him to take care of his joints to prevent injuries.
   医生建议他注意关节，以防止受伤。