soft grit

例句：

1. 1. The soft grit in the soil helps plants grow better.
   土壤中的软砂有助于植物生长。
2. 2.The engineer used a machine to crush the hard grit into fine sand.
   工程师使用机器将坚硬的砂砾碾成细沙。
3. 3.The builders were using soft grit to level the land before building.
   建筑工人正在使用软砂来平整土地以便建造。