生物多样性英文

shipsofdesert

--exposition

本文档共25页；当前第1页；编辑于星期二\3点15分expositionExpositionisexplanatorywriting.ItspurposeistoexplainorclarifyapointPatternsofexposition:exemplification;processanalysis;causeeffectanalysis;comparisonandcontrast;classification;analogy;definition.

本文档共25页；当前第2页；编辑于星期二\3点15分OrganizationPart1(para.1-8):thelistoftheimagesofenvironmentaldestruction:thedryingupoftheAral;deforestation;airpollutionPart2(para.9-16):analysisoftheglobalthreatsposedbytheenvironmentaldestructionandthecommoncause---thechangeintherelationshipbetweenhumancivilizationandtheearth’snaturalbalancePart3(para.17-26):thesolutiontoenvironmentaldestructions---reinventingandhealingtherelationshipbetweencivilizationandtheearth本文档共25页；当前第3页；编辑于星期二\3点15分Lossofbiodiversity本文档共25页；当前第4页；编辑于星期二\3点15分Biodiversity（生物多样性）Definition：Biologicaldiversity(biodiversity)referstoarangeofdiverselivingorganisms(animals,plants,micro-organisms)onaregularbasisconstitutedbythecombinationofstableecologicalcomplexes.本文档共25页；当前第5页；编辑于星期二\3点15分Valueofbiodiversityanditssignificance：Directvalue：（1）biodiversityprovidesfood,fiber,buildingmaterialsandfurniture,andotherindustrialrawmaterialsforhumanbeings.本文档共25页；当前第6页；编辑于星期二\3点15分（2）Biodiversityalsohaveaestheticvalue（美学价值）,wecancultivateoursentimentsandbeautifypeople’slives.Inaddition,biodiversitycanalsostimulateinspirationforliteraryandartisticcreation.wintersweet

本文档共25页；当前第7页；编辑于星期二\3点15分chrysanthemum本文档共25页；当前第8页；编辑于星期二\3点15分bamboo本文档共25页；当前第9页；编辑于星期二\3点15分（3）Biodiversityhasanimportantecologicalfunction.Nomatterwhatkindofecosystem,wildlifeisoneoftheessentialcomponents.Wildlifeoncereduced,theecosystemstabilitywouldbedestroyed,thesurvivalenvironmentofmankindwouldalsobeaffected.本文档共25页；当前第10页；编辑于星期二\3点15分thepotentialvalue:

asfarasthemedicinalproperties,80%ofthepopulationsindevelopingcountriesrelyonplantsoranimals,toensurethebasichealth.本文档共25页；当前第11页；编辑于星期二\3点15分本文档共25页；当前第12页；编辑于星期二\3点15分本文档共25页；当前第13页；编辑于星期二\3点15分Causesofbiodiversityreduction:1、Therapidincreaseinpopulation.本文档共25页；当前第14页；编辑于星期二\3点15分Thepopulationkeepsincreasing,soarablelandmustbeexpandedtomeetdemandsofeating,thisbecomesthedirectthreattothenaturaleco-systems.本文档共25页；当前第15页；编辑于星期二\3点15分2、Overexploitation

本文档共25页；当前第16页；编辑于星期二\3点15分Environmentalpollution

本文档共25页；当前第17页；编辑于星期二\3点15分killing本文档共25页；当前第18页；编辑于星期二\3点15分本文档共25页；当前第19页；编辑于星期二\3点15分No!!!本文档共25页；当前第20页；编辑于星期二\3点15分Aretheseproblemsdifficulttobesolved?本文档共25页；当前第21页；编辑于星期二\3点15分Aslongas