curve of constant breadth

例句：

1. 1. The curve of the river is beautiful.
   这条河的曲线很美。
2. 2. The car drove along a curved road.
   汽车沿着一条弯曲的道路行驶。
3. 3. The mountain range follows a curving path.
   山脉沿着一条弯曲的路径延伸。