conical spiral

例句：

1. 1. The cone-shaped spiral staircase leads to the top floor.
   圆锥形的螺旋楼梯通向顶层。
2. 2. The spiral pattern on the wall is a reminder of the natural world.
   墙上的螺旋图案是大自然的提醒。
3. 3. The architect designed the spiral ramp to make it easier for people with disabilities to access the building.
   建筑师设计了螺旋坡道，以便残疾人更容易进入大楼。