密高岭土

例句：

1. 1. The farmer used to digup the soil for fertilizer.
   农民过去常挖土作为肥料。
2. 2. The scientistanalyzed the soil samples for signs of pollution.
   科学家分析土壤样本以寻找污染迹象。
3. 3.The construction crew worked on the soil toprepare the site for the new building.
   建筑工人在土壤上工作，为新建筑准备场地。