clay mineral analysis

例句：

1. 1. The study of clay minerals iscrucial for understanding the geological history ofa region.
   粘土矿物的研究对于理解一个地区的地质历史至关重要。
2. 2. The claymineral analysis revealed that therewas a significant amount of organicmatter in the soil.
   粘土矿物分析显示土壤中存在大量的有机物质。
3. 3. Theclay mineral analysis helped us to identify thesource of the water in the river.
   粘土矿物分析帮助我们确定了河流中水源的来源。