loss of rigidity

例句：

1. 1. Thepatient's condition worsened after thesurgery, with a significant loss of rigidity.
   手术后，患者的病情恶化，显著的僵硬度丧失。
2. 2. The elderly person experienceda sudden loss of rigidity during hissleep.
   这位老人在睡眠中突然失去了僵硬感。
3. 3. The researcher found that theloss of rigidity was associated with thedevelopment of arthritis.
   研究者发现，僵硬度的丧失与关节炎的发展有关。