sand-gravel road

例句：

1. 1. The sand-gravel road was so bumpy that it made me feel uncomfortable.
   这条沙砾路太颠簸了，让我感到不舒服。
2. 2. The sand-gravel road is the only way to get to the beach from the city center.
   这条沙砾路是通往市中心海滩的唯一路线。
3. 3. The sand-gravel road was filled with potholes, making it difficult to drive.
   这条沙砾路布满了坑洼，开车很困难。