读写译教师用书unit five life science

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1、UnitFiveLifeScienceTheTextIntroductionAgingisanaturalphenomenon.Somepeoplecansuccessfullystayhealthyintooldage,butsomepeoplesufferalotfromage-relateddiseasesastheyareaging.Whatisahealthylifeextension?Scientistsareplanningtosequencegenestohavebetterunderstand

2、ingofthegeneticvariationsthathelppeopleescapetheaging-relateddiseasessuchasheartdisease,canceranddiabetes.Scientistsplantofocusonthegenesthatarelinkedtohealthandlongevityandstartedsearchingthegenomeforcluestohealthyagingandalengthylifespan.Theirstudyrevealst

3、hatoldhealthypeoplearegeneticallysusceptibletomanyseriousdiseasesincludingcardiovasculardisease,strokeanddiabetes,theydon’tgetanyofthesediseases.Whydosomepeoplelivealonglifewithoutsufferingfromage-relateddiseases?Researchershavesequencedgenesinoldhealthypeop

4、leandcomparedthemwithDNAsamplesofpeoplewhodiedfromage-relateddiseases.Theyhavefoundthattheseolderhealthypeoplearemorelikelytocarryprotectivegenesthatplayanimportantroleinpeople’ssuccessfulaging.LanguagePoints121.sequencev.(Par.1):arrangeinaparticularordere.g

5、.tosequencethebooksinthelibrarysequencen.:anumberofthings(actions,events,etc)thathappenorcomeoneafteranothere.g.thesequenceofeventsleadingtowar2.shedlighton(Par.1):makesthclearandeasytounderstande.g.We’rehopingthatthisletterwillshedsomelightonthemystery.3.ai

6、lmentn.(Par.1):anillness(thatisnotveryserious)e.g.aphysical/minorailmentHedoesn’thaveeventheslightestailment.4.insulaten.(Par.1):protectorcoversthwithamaterialthatpreventselectricity,heatorsoundfrompassingthroughe.g.Youcansavealotofmoneyonheatingifyourhousei

7、swellinsulated.5.blemishn.(Par.2):amarkthatspoilsthewaysthlookse.g.Makeuptohidespotsandotherblemishes.6.Thesepeoplehavegeneticsusceptibilitymarkersformanyseriousdiseases,includingcardiovasculardisease,stroke,anddiabetes,buttheydon'tgetanyofthesediseases.(Par

8、.2):…thesepeoplearelikelytosufferfrommanyseriousdiseasessuchascardiovasculardisease,stroke,anddiabetes,buttheydon’tgetanyofthem.cardiovasculara.:relatingtotheheartandbloodvessels.7.accountfor(Pa