thin section of soil

例句：

1. 1.The thin section of the soil revealed a rich layer of organic matter.
   土壤的薄层揭示了丰富的有机物质。
2. 2. The thin section of the soil showed that the roots were growing deeper into the ground.
   土壤的薄层显示根正在更深的地层中生长。
3. 3.The thin section of the soil was analyzed to determine its composition and quality.
   土壤的薄层被分析以确定其组成和质量。