double esker

例句：

1. 1. The double esker is a popular destination for hikers and cyclists.
   双曲率是徒步和骑自行车者的一个热门目的地。
2. 2. The double esker is a natural wonder that attracts visitors from all over the world.
   双曲率是一个自然奇观，吸引了来自世界各地的游客。
3. 3.The double esker is a symbol of the region's rugged terrain and challenging weather conditions.
   双曲率是该地区崎岖地形和恶劣天气条件的象征。