关于撒哈拉沙漠的英语作文

Thedesertsurfaceiscoveredbyathicklayeroffinesand-likesand(ithasbeentotheseaside»andthebeachisthesame.'sJustadifferentreason,thewaterisalong-term,andtheotheristhewindLong-termrole.)Desertisapeacefulland,thedesertsurfacewillchangeandmovementoftheirown,ofcourse,istheroleofthewind.Becausethesandwillrunwiththewind.Layersofsandduneswillmoveoverandchangeintodifferentforms.Temperaturedifferencebetweenthedesertareas,theaverageannualtemperatureupto30-50℃,thetemperaturedifferencegreater,summerafternoon,thegroundtemperaturecanreachmorethan60℃,ifthebeachLimaianeggandsoontheShaoshu.Thenighttemperaturealsodroppedtobelow10℃.Asthetemperaturedifferencebetweendayandnight,isconducivetothestorageofsugar,sothedesertoasisoffruitsareparticularlysweet.Desertwindandsand,andstrongwinds.-Largestwindup10-12.StrongwindoverthelargenumberofFusha,aferociouswindandsandflow,constantlyblowingpittingthegroundsothatthelandscapechangesdramatically.Valuetopeople'svigilanceisthatsomeformofthedesertisnotnatural,butman-madecauses.SuchastheUnitedStatesbetween1908-1938dueto900millionmuofdeforestation,thedestructionofvastgrassland,withtheresultthatlargegreenspaceintoadesert.TheSovietUnionin1954-1963,themovementofReclamation,theCentralAsiansteppewasseverelydamaged,hasnotbeencultivatedland,thedeserthasbroughtdisaster.Subgreatharmtohumanbeings,itengulfingfarmland,villages,buriedrailways,highwaysandothertransportationfacilities.Accordingtohistoricalrecords,ChinaontheSilkRoadLoulancity,isengulfedbythedesert.Now,mankindisdoingeverythingpossibletopreventdesertification,suchasafforestation,plantinggrasssand,setupsandbarrierandsohavereceivedaverygoodresults.