translation.en: And in the process of passing through the wetland and percolating through the ground, the water encounters microbes that live on the surfaces of the plants and the surfaces of the soil, and that purifies the water.
translation.zh: 这些水在穿过湿地 渗入地下的过程中， 会接触到生活在植物和土壤表面 的微生物， 它们能净化水。