rigidity of nape and headache

例句：

1. 1. The material has a high degree ofrigidity.
   这种材料具有很高的刚性。
2. 2. Thechair is too rigid for my liking.
   这把椅子对我来说太硬了。
3. 3. Rigidity can lead to stiffness inthe joints.
   刚性可能导致关节僵硬。