macadam foundation

• 碎石基层

macadam foundation的用法和样例：

例句

1. The paper mainly expounds essentials for control of cement-stabilized macadam base for construction.
   主要阐述了水泥稳定碎石基层施工控制的要点。
2. Therefore, he laid a base course of crushed stone on top of a compact footing instead of the costly stone foundation.
   因此他就在压紧的路基上铺碎石基层，而不使用造价很高的石块路基。