用英语介绍水的循环

High above the surface of the earth, water molecules change into liquid that falls down in preciptation of rain to the earth. Rain water flows down from streams to large reserviors which serve drinking water for people and animals. At this point, water begin its return trip to nature. In every home, it strains from bathroom sinks, flush toilets into the community sanitary sewer system which leads to the public treatment plant. After the treatment, the cleaned water is released to a lake or river where close to a bay or the ocean, it will be used again by other people along its way in irrigation, industries or as drinking water, or it will evaporate into the atmosphere or it may return again in some other part of the world.