graded aggregate mixture

例句：

1. 1.The engineer used a graded aggregate mixture to improve the quality of the road surface.
   工程师使用一种分级混合料来提高道路表面的质量。
2. 2.The construction crew mixed graded aggregate mixture to create a stable base for the new road.
   施工队将分级混合料混合在一起，以创建新道路的基础。
3. 3.The project manager carefully selected the right graded aggregate mixture to ensure durability and longevity of the road.
   项目经理仔细选择了正确的分级混合料，以确保道路的耐用性和持久性。