gravel

Gravel crunched beneath our shoes as we approached the cottage. ▶

我们走近小屋时，脚下的碎石发出嘎吱声。

Gravel paths can allow rainwater to drain into the soil, reducing surface runoff in urban parks.

碎石小径可以让雨水渗入土壤，减少城市公园的地表径流。