九年级英语u14重点单词短语

九年级英语u14重点单词短语

1.Disaster:Adisasterreferstoanyeventoroccurrencethatcausesgreatdamageorloss.Itcouldbeanaturaldisasterlikeanearthquakeoraman-madedisasterlikeafire.Forexample,"Theearthquakewasadisasterforthetown,destroyingmanybuildingsandleavingpeoplehomeless."

2.Emergency:Anemergencyisasituationthatrequiresimmediateactionorattention.Itofteninvolvesasuddenandunexpectedeventthatposesathreattopeople'ssafetyorwell-being.Forinstance,"Thecaraccidentcausedamedicalemergency,andtheinjuredpersonwasrushedtothehospital."

3.Evacuate:Toevacuatemeanstomovepeoplefromadangerousplacetoasaferlocation.Thisisusuallydoneinresponsetoadisasteroremergency.Forexample,"Duringthehurricane,theresidentswereforcedtoevacuatetheirhomesandseekshelterelsewhere."

4.Relief:Reliefreferstotheassistanceorsupportprovidedtothoseaffectedbyadisasterorinneed.Itcouldbeintheformoffood,clothing,ormedicalsupplies.Forinstance,"TheRedCrossprovidedrelieftothefloodvictimsbydistributingfoodandwater."

5.Survival:Survivalreferstotheactofremainingaliveandovercomingdifficultordangeroussituations.Itofteninvolvesadaptingtoone'senvironmentandmakingthenecessarypreparations.Forexample,"Thehiker'ssurvivalskillshelpedhimenduretheharshconditionsinthewilderness."

6.Aid:Aidreferstothehelporassistancegiventosomeoneinneed.Itcouldbefinancial,material,orlogisticalsupport.Forinstance,"Theinternationalcommunityprovidedaidtotheearthquake-strickencountry,sendinginrescueteamsandreliefsupplies."

7.Drought:Adroughtisaperiodofunusuallydryweather,resultinginalackofwaterforcropsandvegetation.Itcancauseagriculturallossesandwatershortages.Forexample,"Theprolongeddroughtledtocropfailureandwidespreadfamineintheregion."

8.Famine:Faminereferstoawidespreadscarcityoffood,leadingtostarvationanddeath.Itisoftencausedbyfactorslikedrought,war,oreconomicinstability.Forinstance,"Thegovernment'smismanagementofresourcescontributedtothefaminethatplaguedthecountry."

9.Epidemic:Anepidemicistherapidspreadofacontagiousdiseaseamongalargenumberofpeoplewithinapopulationorregion.Itoftenrequirespublichealthmeasurestocontrolandcontaintheoutbreak.Forexample,"Thefluepidemicresultedinmanypeoplefallingillandoverwhelminghospitalswithpatients."

10.Outbreak:Anoutbreakreferstothesuddenoccurrenceofadiseaseorotherundesirablephenomenoninaspecificlocationorpopulation.Itcanoccuronasmallerscalecomparedtoanepidemic.Forinstance,"Therewasanoutbreakoffoodpoisoningattherestaurant,andseveralcustomersfellsickaftereatingthere."

11.Vaccine:Avaccineisabiologicalsubstanceusedtostimulatethebody'simmunesystemtoproduceimmunitytoaspecificdisease.Ithelpspreventinfectionsandreducestheseverityofillness.Forexample,"Themeaslesvaccinehasgreatlyreducedthenumberofcasesanddeathsfromthedisease."

12.Isolation:Isolationreferstotheactofseparatingorkeepingsomeoneorsomethingawayfromothersforhealthorsafetyreasons.Itisoftenusedduringoutbreaksorpandemicstopreventthespreadofdisease.Forinstance,"Theinfectedindividualwasplacedinisolationtopreventothersfromcontractingthevirus."

13.Quarantine:Quarantineissimilartoisolationbutinvolvestheseparationandrestrictionofmovementforpeopleoranimalswhohavebeenexposedtoacontagiousdisease.Ithelpspreventthespreadoftheillnessduringtheincubationperiod.Forexample,"PassengersonthecruiseshipwereplacedinquarantineafterseveralcasesofCOVID-19weredetected."

14.Contaminate:Tocontaminatemeanstomakesomethingimpureorharmfulbyaddingaforeignorundesirablesubstance.Itisoftenusedinthecontextoffood,water,ortheenvironment.Forinstance,"Thewatersupplywascontaminatedbyindustrialwaste,leadingtowidespreadillnesses."

15.Hazard:Ahazardreferstoanythingthatposesathreatordangertopeopleortheirsurroundings.Itcouldbeaphysical,chemical,orbiologicalhazard.Forexample,"Thebrokenglassonthesidewalkisahazardthatcouldcauseinjuriesifnotcleanedup."

16.Pollution:Pollutionistheintroductionofharmfulsubstancesorpollutantsintotheenvironment,resultingindamagetoecosystemsandhumanhealth.Itcancomefromvarioussourcessuchasindustry,transportation,orimproperwastedisposal.Forinstance,"Airpollutionfromfactoriescontributestorespiratoryproblemsandclimatechange."

17.Disposable:Disposablereferstoitemsthataredesignedtobeusedonceandthenthrownaway.Theyareoftenmadeofmaterialslikeplasticorpaper.Forexample,"Single-useplasticbagsareacommondisposableitemusedingrocerystores."

18.Recycle:Torecyclemeanstoconvertwastematerialsintoreusablematerialsthroughaprocesscalledrecycling.Ithelpsreducetheamountofwastegoingtolandfillsandconservesresources.Forinstance,"Weshouldrecyclepaper,glass,andplasticbottlestohelpprotecttheenvironment."

19.Preserve:Topreservemeanstomaintainorprotectsomethinginitsoriginalstateorcondition.Itcouldrefertopreservingnature,culturalheritage,orhistoricalsites.Forexample,"Nationalparksareestablishedtopreservethenaturalbeautyandbiodiversityofanarea."

20.Conserve:Toconservemeanstouseormanageresourcesinacarefulandsustainableway,avoidingwasteordepletion.Itisoftenusedtopromotetheresponsibleuseofnaturalresourceslikewaterorenergy.Forinstance,"Turningoffthelightswhenleavingaroomhelpsconserveenergy."21.Sustainable:Sustainablereferstopractices,products,orsystemsthatcanbemaintainedoverthelongtermwithoutdepletingresourcesorcausingharmtotheenvironment.Forexample,"Usingrenewableenergysourceslikesolarandwindpowerisasustainableapproachtomeetourenergyneeds."22.Carbonfootprint:Acarbonfootprintisameasureoftheamountofcarbondioxideandothergreenhousegasesemittedduetotheactivitiesofanindividual,organization,orproduct.Itisusedtoassessenvironmentalimpactandpromotereductioninemissions.Forinstance,"Reducingunnecessarytravelcanhelploweryourcarbonfootprint."23.Biodiversity:Biodiversityreferstothevarietyoflifeforms,includingplants,animals,andmicroorganisms,withinaspecificareaorecosystem.Itisimportantformaintainingecologicalbalanceandprovidingessentialserviceslikepollinationandnutrientcycling.Forexample,"Protectingrainforestsiscrucialformaintainingglobalbiodiversity."24.Deforestation:Deforestationistheprocessofremovingorclearingtreesandvegetationfromland,oftenforagriculture,logging,orurbanization.Itcanleadtolossofhabitat,soilerosion,andnegativeimpactsonclimate.Forinstance,"RapiddeforestationintheAmazonrainforestiscausingwidespreadconcernforitseffectsontheenvironment."25.Ecosystem:Anecosystemisacommunityoflivingorganisms,suchasplants,animals,andmicroorganisms,alongwiththenon-livingcomponentsoftheirenvironment,likeair,water,andsoil.Thesecomponentsinteractanddependoneachotherforsurvival.Forexample,"Thecoralreefecosystemishighlydiverseandprovideshabitatformanymarinespecies."26.Climatechange:Climatechangereferstolong-termshiftsintemperature,precipitation,windpatterns,andotheraspectsofEarth'sclimatesystem.Itisprimarilycausedbyhumanactivities,particularlytheburningoffossilfuelsanddeforestation.Forinstance,"Risingglobaltemperaturesduetoclimatechangeareleadingtomorefrequentandsevereheatwaves."27.Globalwarming:GlobalwarmingisaspecifictypeofclimatechangethatreferstothegradualincreaseinEarth'saveragesurfacetemperatureduetothebuildupofgreenhousegasesintheatmosphere.Itisasignificantaspectofclimatechange.Forexample,"Themeltingofpolaricecapsisavisibleeffectofglobalwarming."28.Climaterefugee:Aclimaterefugeeisapersonwhoisforcedtoleavetheirhomeduetoenvironmentalfactorslikerisingsealevels,drought,orextremeweathereventsexacerbatedbyclimatechange.Forinstance,"Increasinglyseverestormshaveforcedmanycommunitiesalongthecoasttorelocateasclimaterefugees."29.Climatejustice:Climatejusticeisanapproachthatconsidersthesocial,economic,andenvironmentalimpactsofclimatechange,andadvocatesforequitablesolutionsthataddresstheneedsofvulnerablecommunitiesandtheplanet.Forexample,"Climatejusticeinitiativesaimtoreducegreenhousegasemissionswhilealsoimprovingairqualityinpollutedcities."30.Greenhousegas:GreenhousegasesaregasesintheEarth'satmospherethatcontributetothegreenhouseeffect,trappingheatandcausingtheplanettowarm.Commongreenhousegasesincludecarbondioxide,methane,andnitrousoxide.Forinstance,"Reducingmethaneemissionsfromlivestockfarmingisaneffectivewaytomitigateclimatechange."31.Renewableenergy:Renewableenergyreferstoenergygeneratedfromsourcesthatarenaturallyreplenishedandneverdeplete,suchassolar,wind,hydro,andgeothermalpower.Itisakeycomponentoftransitioningtoasustainableenergysystem.Forexample,"CountrieslikeDenmarkareleadingthewayinrenewableenergy,gettingasignificantpor