spiral-shaped agitator

例句：

1. 1. Thecar's engine is a spiral-shaped design that makes it efficient.
   这辆车的引擎是螺旋形状的设计，使其效率很高。
2. 2. The spiral-shaped staircase leads up to the second floor.
   螺旋形的楼梯通向二楼。
3. 3. Thespiral-shaped shell ofthe octopus isused for protection and defense.
   章鱼的螺旋形外壳用于保护和防御。