torsion of a curve

例句：

1. 1.The rope was twisted around the post.
   绳子绕在柱子上。
2. 2. He twisted his arm to get her to go with him.
   他努力说服她和他一起去。
3. 3. The car's steering wheel is twisted when it's parked.
   汽车停放时方向盘是扭曲的。