圆形物

例句：

1. 1. The ball is in the middle of the circle.
   球在圆圈中间。
2. 2. The teacher drew a circle on the board.
   老师在黑板上画了一个圆。
3. 3.The car circled around the park before it left.
   汽车在离开前在公园周围转了一圈。