地面很粗糙。

The ground was ___rough.

那是一条粗糙的山路，布满了石头和大坑。

It was a ___rough mountain road, covered in stones and huge holes.

我对他们能在粗糙的地形上骑自行车印象深刻。

I was impressed with how well they can ride a bike on ___rough terrain.