deposition of coal particle

例句：

1. 1. The river has deposited a largeamount of silt in the past fewyears.
   过去几年里，河流在河床上沉积了大量的泥沙。
2. 2. The scientist conducted experimentsto study the process of sedimentation.
   科学家进行了实验来研究沉积过程。
3. 3. Theerosion of the land has led tothe deposition of minerals in the soil.
   土地的侵蚀导致矿物质在土壤中沉积。