translation.en: The water comes into our treatment wetland, it's exposed to sunlight and algae and those break down the organic chemicals, remove the nutrients and inactivate the waterborne pathogens.
translation.zh: 河水流入我们的人工湿地， 在阳光暴晒和水藻的作用下， 有机化学物被分解， 营养物被消耗，水生病原体被杀死。