雅思写作小作文高分范文—雨水成为饮用水的过程
2018/3/8 15:07:04来源：新航道作者：新航道
摘要：雅思写作是中国考生们的一大头疼科目，难以提高的科目.上海新航道雅思小编雅思写作小作文高分范文—雨水成为饮用水的过程，希望帮助考生对照写作范文研究真题，充分备考，争取理想成绩，实现留学梦想。
雅思写作是中国考生们的一大头疼科目，难以提高的科目.上海新航道雅思小编雅思写作小作文高分范文—雨水成为饮用水的过程，希望帮助考生对照写作范文研究真题，充分备考，争取理想成绩，实现留学梦想。
雅思写作参考范文：
The flow chart above shows the process of purification of rain for drinking water in Australian. Overall, 4 main stages are involved: collection, filtration, storage and treatment.
Firstly, rain falling on the roof, the raw material for drinking water, flows down along gutters and into drains, which then direct the water into underground filtration system. Next, water goes through a physical filter slowly which serves to remove particulates from rainwater. After percolation, the water is delivered by the pipe to a large cube-shaped container and be stored carefully.
For the purpose of producing drinkable water, there is another stage for further treatment. Specifically, the water is transferred into a bigger tank, in which some chemicals are added and mixed with stored water. This chemical reaction is able to fully eliminate impurities, thus enhancing the quality of water up to a safe and potable level for human.
Finally, through water pipe, the well-treated water is pressed and directed to the resident house for daily use.
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