Definition: A rough surface is not smooth. Level: B1
地面粗糙不平，使得行走困难。
The ground was ___rough and uneven, making it hard to walk.
那是一条崎岖的山路，覆盖着石头和大坑。
It was a ___rough mountain road, covered in stones and huge holes.
在崎岖地形上骑自行车需要平衡和技巧。
Riding a bike on ___rough terrain requires balance and skill.
