planispiral

例句：

1. 1.The spiral staircase leads up to the second floor.
   螺旋楼梯通往二楼。
2. 2. The spiral shell of a jellyfish is used for protection.
   水母的螺旋壳用于保护。
3. 3. The path was lined with spiraling vines.
   小径旁缠绕着螺旋状的藤蔓。