false joint

例句：

1. 1. The doctor told him that he had a false joint in his knee.
   医生说他膝盖里有假关节。
2. 2.She was surprised to find out that the false joint was causing her pain.
   她惊讶地发现假关节正在给她带来疼痛。
3. 3.After surgery, the doctor removed the false joint and replaced it with a real one.
   手术后，医生移除了假关节并用一个真正的关节替换了它。