heworldisnotonlyhungry,butalsothirstyforwater.Thismayseemstrangetoyou,sincenearly75%oftheearth'ssurfaceiscoveredwithwater.Butabout97%ofthishugeamountisseawater,orsaltwater.Mancanonlydrinkandusetheother3%--thefreshwaterthatcomesfromrivers,lakes,underground,andothersources.Andwecannotevenuseallofthat,becausesomeofitisintheformoficebergsandglaciers.Evenworse,someofithasbeenpolluted.
However,asthingsstandtoday,thissmallamountoffreshwater,whichisconstantlybeingreplacedbyrainfall,isstillenoughforus.Butourneedforwaterisincreasingrapidly--almostdaybyday.Onlyifwetakestepstodealwiththisproblemnowcanweavoidasevereworldwidewatershortagelateron.Alimitedwatersupplywouldhaveabadeffectonagricultureandindustry.Letmegiveyoujustonesmallexampieofhownecessarywateristoindustry.Didyouknowthattoproduceasingletonofsteel,ittakesabout91,000litersofwater?
Weallhavetolearnhowtostopwastingourpreciouswater.Oneofthefirststepsweshouldtakeistodevelopwaysofreusingit.Experimentshavealreadybeendoneinthisfield,butonlyonasmallscale.Forus,thesystemsareasimportantasthespacecraft.
Waterisveryimportanttous.
Ifthereisnowaterwewilldie.Wecaneatnothingforfewdaysbutwemustdrinkwatereveryday.Besidesifthereisnowatertheplantswillnotgrowandtheanimalswillnotlive.Thereforetherewillnofoodforus.Butthewaterhasbeenseverelypollutednowadays.Muchwaterisnotsuitablefordrinking.Forourhumanbeingsandourplanetwemustprotectwater.
Withoutittherewouldbenolifeanylongerinearth.
水对我们来说是很重要的.。
如果没有水，我们会死。我们可以几天不吃东西，但是我们每天都必须喝水。此外，如果没有水，植物就不能生长，动物也活不下去。因此，我们也就没有了食物。但是现在水资源却被严重污染，很多水都已经不适合饮用。为了我们和我们的星球，我们一定要保护水资源。
没有水，地球上也就不会再有生命的存在。
Itwasnoon,andmotherwenttowashtheradishesandvegetables.
Motherfirstfillupthewater,thentakethewhiteradishtotakeupagainblunt,wanttobluntclean.Theheadofthewaterwasopen,andthewaterinthebucketwasfilledtotheoutside.Motherdidnotsee,didnotknowthatthewatercanbewasted,motherdidnotcare.Ababybrothercameandtoldhismother:mom,waterisaresource,notawasteofah,wewanttogetintothehabitofsavingwater,sothatwhenwethirstaftercanhavewatertodrink.Otherwise,thewaterisallwasted,wewillspendallofourmoney,weshouldkeepthehabitofsavingwater.
已经到中午了，妈妈去把白萝卜和青菜洗一洗。
妈妈先把水装满，然后再把白萝卜拿起来再冲，要冲的干干净净的。水笼头都开着，然后水桶里面的水都满到外面去了。妈妈没看见，就不知道以为水可以乱浪费，妈妈就不管了。一个小弟弟来了，跟他的妈妈说：妈妈，水是资源，不能白白浪费啊，我们要养成节约用水的习惯，这样我们以后干渴的.时候就可以有水喝了。要不然的话，水全都浪费了，我们钱都会花完的，我们要养好节约用水的习惯。
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