circument

例句：

1. 1.The machine is made of a cylindrical shape.
   这台机器的形状是圆柱形的。
2. 2. The car has a cylinder-shaped engine.
   这辆车有一个圆柱形的发动机。
3. 3. The cylinder is used to store liquids.
   这个筒状物用来储存液体。