tendinous sheath of flexor pollicis longus

例句：

1. 1. The doctor removed the tendon sheath to relieve his pain.
   医生移除了腱鞘以缓解他的疼痛。
2. 2.Tendon sheath injuries are common in sports and can be painful.
   运动中常见的腱鞘损伤，可以很痛。
3. 3. Tendon sheath ruptures are rare but can lead to significant disability if not treated promptly.
   腱鞘断裂很少见，但如果不及时治疗，可能会导致严重的残疾。