雅思作文其实离不开考生平时的积累和练习，那么有哪些好的作文值得借鉴呢?具体情况如何呢?请继续往下看具体介绍或者点击收藏，和出国留学网一起来看看雅思写作小作文范文：雨水成为饮用水，欢迎阅读。雅思写作小作文范文：雨水成为饮用水Theflowch...
雅思作文其实离不开考生平时的积累和练习，那么有哪些好的作文值得借鉴呢?具体情况如何呢?请继续往下看具体介绍或者点击收藏，和出国留学网一起来看看雅思写作小作文范文：雨水成为饮用水，欢迎阅读。
雅思写作小作文范文：雨水成为饮用水
TheflowchartaboveshowstheprocessofpurificationofrainfordrinkingwaterinAustralian.Overall,4mainstagesareinvolved:collection,filtration,storageandtreatment.
Firstly,rainfallingontheroof,therawmaterialfordrinkingwater,flowsdownalongguttersandintodrains,whichthendirectthewaterintoundergroundfiltrationsystem.Next,watergoesthroughaphysicalfilterslowlywhichservestoremoveparticulatesfromrainwater.Afterpercolation,thewaterisdeliveredbythepipetoalargecube-shapedcontainerandbestoredcarefully.
Forthepurposeofproducingdrinkablewater,thereisanotherstageforfurthertreatment.Specifically,thewateristransferredintoabiggertank,inwhichsomechemicalsareaddedandmixedwithstoredwater.Thischemicalreactionisabletofullyeliminateimpurities,thusenhancingthequalityofwateruptoasafeandpotablelevelforhuman.
Finally,throughwaterpipe,thewell-treatedwaterispressedanddirectedtotheresidenthousefordailyuse.
