剑桥顶级教材unlock 4级课件-Unit 4 RW Video.pptx

Unlock4Unit4RWVideo

Firstapandemic,thenthefloods:VillagersinsouthernChinafacedevastationagainItwastheworstfloodindecades,oneofmanythathavebeenravagingswaths(/AmE?r?v?d?/devastate|sw??θ|expanseofland）ofsouthernandcentralChinasinceearlyJune,forcingmillionstoevacuate,damagingmorethan28,000homesandleaving141deadormissing,accordingtoofficialnumbers.

1Floodscanoccurwhenalotofrainfallsinashortperiodoftime,especiallyafteralongperiodofdryweather;theycanalsooccurwhenriversgettoofullafterprolongedrainfall.Droughtscanbetheresultofunusualweatherpatterns,e.g.changesintheprevailingwinddirectionorjetstream.

infrastructurethebasicsystemsandservices,suchastransportandpowersupplies,thatacountryororganizationusesinordertoworkeffectively(n)

TheAralSea咸海(（中亚地区的咸水湖，位于哈萨克斯坦和乌兹别克斯坦之间）：60年代，在前苏联开始实行灌溉项目前，咸海(TheAralSea)是世界上第四大湖泊。在2005-2009年干旱期间，湖水遭到了杀虫剂和化肥的污染，水量不断减少。

F1%TTF4,…theresultofincreasingpopulation,poorinfrastructure,politics,povertyorlivinginadrypartoftheworld.F5,…morethan25,000squaremiles.Itisnow10%ofitsoriginalsize.

70%distributionpopulationinfrastructurecommonspacedrought

Takeshortshowers.Shutwateroffwhilebrushingteeth.Runfullloadsofdishesandlaundry.Limittheamountoffertilizerusedonplants.Turndownwaterpressurewhenyoudon’tneedittocomeoutofthefaucetatfullforce.Avoidpurchasingwatertoysthatrequireaconstantflowofwater.

Whenbuyingnewapplianceslikewashers,dryersandmore,considerpurchasingmodelsthatconservewater,notjustelectricity.Checkforleakyfaucetsandhavethemfixed.Purchaseaninstantwaterheater（热水器）andplaceitnearyoursinkinthekitchen,soyoudon’twastewaterwhileyouarewaitingforittoheatup.Ifyoudropicecubesonthefloor,don’tthrowthemaway–puttheminahouseplant（室内盆栽植物）toslowlywaterthemastheymelt.

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