Slopes: Uniform 2-4% ideal. Hilly is good. Flat is a challenge.

坡度：坡度为2- 4%的连续坡地最佳，山地优于平地，平地的挑战更大。

youdao

Slopes: Uniform 2-4% ideal. Hilly is good. Flat is a challenge.

坡度：坡度为2- 4%的连续坡地最佳，山地优于平地，平地的挑战更大。

youdao