tendinous sheath of extensores carpi radiales

例句：

1. 1.The doctor removed the tendon sheath to relieve the pain in my shoulder.
   医生移除了腱鞘以缓解我的肩膀疼痛。
2. 2. Tendon sheath injuries are common in athletes.
   运动员中腱鞘损伤很常见。
3. 3.The tendon sheath protects the tendons within it and helps them move smoothly.
   腱鞘保护其中的肌腱，帮助它们顺畅移动。