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懂你英语Level3Unit3
Unit3-1Listening自然灾害和环境保护
Therearemanyformsoflivesonearth,includinghumanbeings.Lifeexistsinavarietyof
conditions.Someformsoflivesliveinthewateryenvironment,liketheoceans.Otherformsoflivescanbefoundinverydryareaslikedesserts.However,foranyformoflivetoexist,conditionsmustberight.Whentheconditionsaren'rtight,thatformoflivescanextinct.Tobecomeextinctmeanstodieoutcompletely.
Conditionsmustberightforlifetoexist.Millionsofyearsago,therewereformsoflivesthatnolongerexist.Whenconditionchanged,thisformoflifediedout.Oneextinction
eventhappenedabout250millionyearsago.Thisisthelargestextinctioneventofalltime.
Manyformsoflivesbecomeextinct.96%ofalllivesintheoceansdiedout.Mostinsects
alsobecameextinct.Thiseventhappenedoveraperiodofseveralmillionyears.Thecausesofthisextinctioneventarestillunknown.Possiblecausesincludelargestvolcanic
eruptionsandglobalwarming.Somescientistsbelievethattherewereseveralcauses.
Theybelievethataseriesofeventscausedtheextinctions.Scientistsareworkingforbetterunderstandwhatreallyhappened.
Inmoderntimes,wehumanbeingsfacechangingconditions.Forhumanstolive,weneedcleanairandcleanwater.Pollutionisnowagrowingproblemaroundtheworld.Pollutionpoisonstheairandwaterthatwedependon.Pollutedairmakespeoplesickandafraidtogetoutside.Pollutedwaterpoisonsourfoodsupply.Asaresult,weneverknowwhichfoodsaresafetoeat.Humanbeingscanbenotliveinapoisonedenvironment.
Therefore,pollutionisamajorthreattoourexistence.
Humansneedtemperaturetobeinacomfortablerange.Tobeinacomfortablerangemeanstobeneithertoohotnortoocold.Withglobalwarming,globaltemperaturesarerising.Asglobaltemperaturesrise,thepolaricecapswillmelt.Asthepolaricecapsmelt,oceanlevelswillrise.Areasofsomecountrieswillsoonbeunderwater.Peoplewouldbeforcedtorelocatedfromfloodedareas.
Innature,evensmallchangescansometimeshavelargeeffects.It'sdifficulttopredict
what'sgoingtohappen.Theentireecosystemthatwedependonischanging.Someof
thesechangingsareirreversible.Irreversiblechangescannotbeundone.Let'shopethe
humansaresmartenoughtounderstandhowtheworldischanging.Withmoreunderstanding,wemakebetterchoicesaboutwhattodo.Wecanfacethechallengeofthepollutionsandglobalwarming.Weneedtodothisbeforeit'stoolate.Thisplanetofearthisouronlyhomeandweneedtoprotectit.
Unit3-1vocabulary动物和工具
Lizard蜥蜴
Mammalsarecoveredbyhairorfur,haveabackboneandwarm-blooded.Allmammalsproducemilkfortheyoung.
Reptilesarecoveredbys,includessnakes,lizardsandturtles.Reptileshaveabackboneandarecold-blooded,whichmeanstheyoftenrelyontheexternalresourcesofheat.
Birdsarecoveredbyfeatherandarewarmblooded.Mostofthebirdscanflyandmanytypesofbirdmigrategreatdistances.
Mostinsectssuchantsandbeeshaveasmall3partsbodywith3pairsoflegs.Someinsects,suchasmosquitoes,spreaddiseasesthatcausethedeathsofmanyhumans.Unlikeanimals,plantsgettheenergythattheyneedfromthesun.Plantsconvertlight
energyalongwithcarbonandwaterintochemicalenergy.
Scalesandrulersareusedtomeasureweightandlength.Unitsofweightincludeskilogramsandpoundsandunitsoflengthincludescentimetersandinches.
Theseinstrumentsareusedtoobserveverylargeandverysmallobjects.Telescopesare
usedbyastronomersandmicroscopesareusedbybiologistsanddoctors.
Theseappliancesareusedinthekitchensofalmosteveryhome.Stovesareusedtoheat
foodandrefrigeratorsareusedtokeepfoodscoolorcold.
Housetoolslikethese,areusedtobuildorrepairthings.Hammersareusedtopoundinthenailsandscrewdriversareusedtoturnascrew.
Mammalsincludesomeofthemostintelligentanimalsonearth,suchaselephantsandhumanbeings.
Mosquitoescausethedeathofmorehumanthananyotheranimals.
Rulersareusedtomeasurelength
Wecanuseatelescopetoseeobjectsthatarefarway.
Unit3-1dialogue纪念日
Doyouknowwhatdateisittoday?
Whatdoyoumean,it'sthespecialday?
Oh,soyoudon'tremember.
Rememberwhat?
What'sthespecial?
It'souranniversary.Westarteddatingayearagotoday.
Oh,really.Sorry.
Justaminute,whatdoyouthinkthisis.
Oh,it'sneacklace.
Doyoulikeit?
Yes,Ido.It'slovely.Especiallytheredheart.MayIputiton?
No,letmedoit.
Soyoudidremember.
OfcourseIremember.It'sveryspecialforbothofus.
Ihavesomethingforyoutoo.
Youdo?
Yes,butyouhavetowaituntillater.
Oh,Ican'twait.Tellmewhatisit.
Canyouguesswhatitis?
Couldyougivemeah?
Wewentthere3monthsago.
Yes,areyouexcited?
Yousaidyoureallylikethefoodthere.
Yes,that'strue.Ialsorememberedthedessert.Doyou?
Yes,butlet'snottalkaboutthatnow.let'snowviewinthesurprise.
Thatrestaurantlooksnice.
Yes,butitlooksexpensive.
Let'sgoinandlookatthemenu.
Wow,themenulooksgreat,especiallythefish.
Yes,itlooksgoodbutlookatthoseprices.
Let'strysomewhereelse.
Sometimeit'soktospendalittlemoney.
Yes,butthispriceisabittoohigh.Don'tyouthink?
Yes,theyareabithigh.Butdon'tyouthinkitworth?
Let'senjoyourselves.
Em,ok,ifyouputitthatway.Let'sseeifwecantakethetable.
I'vegotyouhaveacreditcard.
Isurehopethefoodisgood.
Stopworrying,let'sjustenjoy.
Unit3-2Listening快速服务维修公司
Quickserveisahomerepaircompany.Itprovidesquick,reliablerepairservicestohomes.
Quickservehandlesplumbingandelectricalissues24hoursaday.Italsocleanstheroofs,fixesinternetconnectionsandreplacesbrokenwindows.Forasmallfee,customerssubscribetotheservice.Itsmaincustomersareelders,whichmeansolderpeople.Whenevercustomershaveproblems,theycancallforhelp.Thereisalsosmallchargeforeachservicecall.
Thecompanywasestablished5yearsagoandisgrowingrapidly.Itstartedin1citybutit'snoiwn5cites.Thecompanyplanstoexpandto10citieswithinthenext24months.Ineachcity,thereissmallcentralofficeinalowrentareaofthecity.Thecentralofficehandlesthebusinesses,advertising,payrollandbilling.Italsotakescallsbycustomer
eitheronlineorbytelephone.Ittakescall24hoursaday,7daysaweek.
60%ofthecompany'semployeesworkfromtheirhomes.Whenacustomercallsintothecentraloffice,aserviceemployeeiscontactedit.Theserviceemployeethencontactscustomerandsetsupanemployment.Theseemployeesarehighlytrainedandprovideexcellentservices.Inemergencies,suchasaseriousplumbingproblem,servicecanbeprovidedwithinanhour.Onereasonforthisisthattheserviceemployeesliveindifferentpartsofthecountry.Theyarenotcentrallocatedsoit'squickandeasyfortheytotravelto
customers‘home.
Quickservehasanexcellentreputation.Itspricesarereasonableanditservicesarequickandefficient.Thecompany'sserviceemployeesareclean,politeandefficient.Inthistypeofbusiness,persontopersoncontactisthekeytosuccess.Witheachsatisfiedcustomer,morecustomerssubscribe.Satisfiedcustomersrecommendquickservetotheirfriends.Thiskindofword-of-mouthadvertisingisverycosteffective.Costeffectmeansthattheresultsaregoodwithoutpayingahighprice.Inotherword,qualityserviceprovidesitsownrewardstothecompany.
Thecompanytakegreatprideinbeinghonestwiththecustomers.Therearenohiddenchargesfortheirservices.Asaresult,thenumberofcustomersineachcityisgrowingrapidly.Withtheagingpopulation,therearemoreelderlypeoplewhoneedhomerepairservices.Thesepeopleneedtohaveconfidenceintheserviceprovider.Theydon'twant
tocheated.
Thesepeopledon'tmindpayingareasonablefeeforhighqualityservice.Highquality
servicesshouldberewarded.
Thecompanyprovidesarangeofserviceplans,eachwithadifferentsubscriptionprice.
Theleastexpensiveserviceplaniscalledthebasicplan.Thisplanprovidesnon-emergencyservicewithaverylowservicecharge.Themostexpensiveservice'splan
istheirVIPplan.TheVIPplanprovidesemergencyservices24hoursadaywithnoadditionalservicecharge.Italsoprovidesrebatesforcustomerswhodon'tcallforany
serviceduringtheyear.Inaddition,quickservegivesbonuspointstocustomersforeach
yeartheysubscribe.Thesebonusescanbeusedtobuynewappliancessuchasstovesandrefrigerators.Ifthebusinesscontinuestogrow,theownersmaydecidetotakethecompanytopublic.Thismeansthatthepubliccanbuysharesofthecompany.Itwouldthenchangefromprivate-ownedcompanytoapubliccompany.Theownersbelievethattheirbusinessissuccessfulandcanexpandaroundworld.Theyalsobelievethattakingtheircompanypubliccanmakethemrich.
Unit3-2vocabulary学科和自然灾害
Biologyisstudyoflife,includingitsstructureandevolution.Biologystudyhowlifesurvives
andreproduces.
Chemistryisthestudyofmatter,includingthestructureofitsatomsandmolecules.Chemistsstudyhowvarioussubstancesinteractwitheachother.
Astronomyisoneoftheoldestsciences.Astronomersstudythestructureandevolutionof
theuniverse,includingthestudyofstars,planetsandgalaxies.
Geologiesisthestudyofstructureofhistoryoftheearthandotherplanets.Geologiststudydifferenttypesofrocks,earthquakesanddifferentlayersoftheearth.
Mathematicsisthe