circular tractrix

例句：

1. 1. The circle of stars is visible from the top of the hill.
   从山顶可以看到星星的圆环。
2. 2. The car was parked in a circular pattern around the lake.
   汽车停在湖周围一个圆形的模式中。
3. 3.The project aims to create a circular economy by reducing waste and recycling materials.
   该项目旨在通过减少浪费和回收材料来创造一个循环经济。