生物多樣性英文

shipsofdesert

--exposition

現(xiàn)在是1頁\一共有25頁\編輯于星期三expositionExpositionisexplanatorywriting.ItspurposeistoexplainorclarifyapointPatternsofexposition:exemplification;processanalysis;causeeffectanalysis;comparisonandcontrast;classification;analogy;definition.

現(xiàn)在是2頁\一共有25頁\編輯于星期三OrganizationPart1(para.1-8):thelistoftheimagesofenvironmentaldestruction:thedryingupoftheAral;deforestation;airpollutionPart2(para.9-16):analysisoftheglobalthreatsposedbytheenvironmentaldestructionandthecommoncause---thechangeintherelationshipbetweenhumancivilizationandtheearth’snaturalbalancePart3(para.17-26):thesolutiontoenvironmentaldestructions---reinventingandhealingtherelationshipbetweencivilizationandtheearth現(xiàn)在是3頁\一共有25頁\編輯于星期三Lossofbiodiversity現(xiàn)在是4頁\一共有25頁\編輯于星期三Biodiversity（生物多樣性）Definition：Biologicaldiversity(biodiversity)referstoarangeofdiverselivingorganisms(animals,plants,micro-organisms)onaregularbasisconstitutedbythecombinationofstableecologicalcomplexes.現(xiàn)在是5頁\一共有25頁\編輯于星期三Valueofbiodiversityanditssignificance：Directvalue：（1）biodiversityprovidesfood,fiber,buildingmaterialsandfurniture,andotherindustrialrawmaterialsforhumanbeings.現(xiàn)在是6頁\一共有25頁\編輯于星期三（2）Biodiversityalsohaveaestheticvalue（美學價值）,wecancultivateoursentimentsandbeautifypeople’slives.Inaddition,biodiversitycanalsostimulateinspirationforliteraryandartisticcreation.wintersweet

現(xiàn)在是7頁\一共有25頁\編輯于星期三chrysanthemum現(xiàn)在是8頁\一共有25頁\編輯于星期三bamboo現(xiàn)在是9頁\一共有25頁\編輯于星期三（3）Biodiversityhasanimportantecologicalfunction.Nomatterwhatkindofecosystem,wildlifeisoneoftheessentialcomponents.Wildlifeoncereduced,theecosystemstabilitywouldbedestroyed,thesurvivalenvironmentofmankindwouldalsobeaffected.現(xiàn)在是10頁\一共有25頁\編輯于星期三thepotentialvalue:

asfarasthemedicinalproperties,80%ofthepopulationsindevelopingcountriesrelyonplantsoranimals,toensurethebasichealth.現(xiàn)在是11頁\一共有25頁\編輯于星期三現(xiàn)在是12頁\一共有25頁\編輯于星期三現(xiàn)在是13頁\一共有25頁\編輯于星期三Causesofbiodiversityreduction:1、Therapidincreaseinpopulation.現(xiàn)在是14頁\一共有25頁\編輯于星期三Thepopulationkeepsincreasing,soarablelandmustbeexpandedtomeetdemandsofeating,thisbecomesthedirectthreattothenaturaleco-systems.現(xiàn)在是15頁\一共有25頁\編輯于星期三2、Overexploitation

現(xiàn)在是16頁\一共有25頁\編輯于星期三Environmentalpollution

現(xiàn)在是17頁\一共有25頁\編輯于星期三killing現(xiàn)在是18頁\一共有25頁\編輯于星期三現(xiàn)在是19頁\一共有25頁\編輯于星期三No!!!現(xiàn)在是20頁\一共有25頁\編輯于星期三Aretheseproblemsdifficulttobesolved?現(xiàn)在是21頁\一共有2