英语演讲,转基因技术.ppt

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1、Agriculturehightechnology——Transgenictechnology硕生化X班QL学号XXXXXX1Keywordstransgenic[trænz‘dʒenik]转基因的foodscarcity[‘skεəsəti]食物短缺trait[trei,treit]性状，特征fluorescence[fluə‘resns]荧光jellyfish[‘dʒelifiʃ]水母omnipotent[ɔm‘nipətənt]无所不能的conceivable[kən‘si:vəbl]可

2、能的；想得到的hazard['hæzəd]危险2Keywordsirreversible[,iri'və:səbl]不可逆的flaw[flɔ:]瑕疵，裂纹3questionDoyouthinkit`snecessarytoindicateontheouterpackageoftransgenicfood,andwhy?4Transgenictechnologyisanewtechnologythattransfersomehelpfulgenesfromonecreaturetoanotherw

3、ithsomespecificbiochemistryandmolecularbiologymethods.ByThesemethodswecanmodifythegeneticmaterialofthecreaturestoimprovetheirproperties、nutritionalcontentandeconomicvalueinordertomeetthedemandofhumanbeings.Transgenictechnology5Atthepresentday,theglob

4、alpopulationisgrowingbyamazingspeedwhilethecultivatedlandareaisdeclining.Foodscarcityhasbecomethehotpotatoinmanycountriesallovertheworld.Currentsituation6ApplicationsOnplantsWecanchangeorimprovethetraitsofplantsbychangingormodifyingtheoriginalgenesor

5、justintroducingsomenewgenes.7IncreaseproductionApplications8ApplicationsImprovethenutritionalcontentApplicationsImprovethenutritionalcontent9ApplicationsDisease-resistantandPest-resistantDrought-resistantandCold-resistant10ApplicationsGeneratenewtrai

6、tsApplicationsGeneratenewtraits11OnanimalsItismoredifficultfornewgenestoexpressinanimalsthaninplants.Butontheotherhand,transgenicanimalscanbringmoreeconomicbenefitsforhumanbeings.Applications12ApplicationsIncreaseproduction13ApplicationsImprovethenut

7、ritionalcontent14ApplicationsAsPets15Althoughtransgenicproductsandtransgeniccropsarenotomnipotent.Buttosatisfypeople'sfoodsupply,improvethequalityofthefood,wemustrelyonscienceandtechnology.16ThesafetyoftransgenicproductsSofar,transgenicfoodissafe.But

8、actually,therearesomanypeoplerefusedtousetransgenicproductsbecausethoseproductsarepotentiallydangerous.17Asfortransgenicbiology,peopleknowverylittleabouttheriskandtheconceivablehazardoftransgenicorganismbecauseofthelackofalargeamountofsamplesandlongt