riprap

例句：

1. 1. The road was built using riprap to improve drainage.
   这条路是用碎石来改善排水的。
2. 2. The engineers used riprap to create a natural barrier along the coastline.
   工程师们用碎石创造了沿海岸线的天然屏障。
3. 3.The construction crew used riprap to fill in the gaps between the buildings.
   建筑工人用碎石填补了建筑物之间的空隙。