percolation leaching

例句：

1. 1.The water percolated through the soil to reach the roots.
   水通过土壤渗透到根部。
2. 2.The oil was percolating through the rock layers.
   油正在岩石层中渗流。
3. 3.The rainwater percolated down the hillside.
   雨水沿着山坡向下渗流。
4. 1. The chemical was leaching out of the solution.
   化学物质正从溶液中渗出。
5. 2. The soil was leached with water to remove impurities.
   土壤被水淋洗以去除杂质。
6. 3. The plant's root system is designed for efficient leaching of nutrients.
   植物的根系设计用于高效的养分淋洗。