pit-run gravel

例句：

1. 1. Theroad was covered in pit-run gravel.
   这条路上覆盖着碎石。
2. 2. Thebuilders used pit-run gravel to level the ground.
   建筑工人使用碎石来平整地面。
3. 3.The old house had pit-run gravelin its driveway.
   这所旧房子的车道上有碎石。