medium silt

例句：

1. 1. The engineer used a medium silt to make the road smoother.
   工程师用中粒土使道路更平滑。
2. 2.The construction crew was working on a project that involved using medium silt.
   施工队正在一个项目中使用中粒土。
3. 3.The soil scientist analyzed the samples and found that they contained medium silt.
   土壤科学家分析了样本并发现它们含有中粒土。