求一篇介绍美国的英语作文

TheUnitedStatesofAmerica,alsoknownastheUnitedStates,theU.S.,theU.S.A.,andAmerica,isacountryinNorthAmericathatshareslandborderswithCanadaandMexico,andaseaborderwithRussia.ExtendingfromtheAtlanticOceantothePacificOcean,theUnitedStatesisafederalrepublic,withitscapitalinWashington,D.C.

Thepresent-daycontinentalUnitedStateshasbeeninhabitedforatleast15,000yearsbyindigenoustribes.[1]AfterEuropeanexplorationandsettlementinthe16thcentury,theEnglishestablishedtheirowncolonies—andgainedcontrolofothersthathadbeenbegunbyotherEuropeannations—intheeasternportionofthecontinentinthe17thandearly18thcenturies.On4July1776,atwarwithBritainoverfairgovernance,thirteenofthesecoloniesdeclaredtheirindependence.In1783,thewarendedinBritishacceptanceofthenewnation.Sincethen,thecountryhasmorethanquadrupledinsize:itnowconsistsof50statesandonefederaldistrict;italsohasnumerousoverseasterritories.

Atover3.7millionsquaremiles(over9.5millionkm�0�5),theU.S.isthethirdorfourthlargestcountrybytotalarea,dependingonwhetherthedisputedareasofChinaareincluded.Itistheworld'sthirdmostpopulousnation,withnearly300millionpeople.

TheUnitedStateshasmaintainedaliberaldemocraticpoliticalsystemsinceitadopteditsArticlesofConfederationon1March1781andtheConstitution,theArticles'replacement,on17September1787.Americanmilitary,economic,cultural,andpoliticalinfluenceincreasedthroughoutthe20thcentury;withthecollapseoftheSovietUnionattheendoftheColdWar,thenationemergedastheworld'ssoleremainingsuperpower.[2]Today,itplaysamajorroleinworldaffairs.

TheearliestknownuseofthenameAmericaisfrom1507,whenaglobeandalargemapcreatedbytheGermancartographerMartinWaldseemüllerinSaint-Die-des-VosgesdescribedthecombinedcontinentsofNorthandSouthAmerica.Althoughtheoriginofthenameisuncertain[3],themostwidelyheldbeliefisthatexpressedinanaccompanyingbook,CosmographiaeIntroductio,whichexplainsitasafeminizedversionoftheLatinnameofItalianexplorerAmerigoVespucci(AmericusVespucius);inLatin,theothercontinents'nameswereallfeminine.Vespuccitheorized,correctly,thatChristopherColumbus,onreachingislandsintheCaribbeanSeain1492,hadcomenottoIndiabuttoaNewWorld.

TheAmericaswerealsoknownasColumbia,afterColumbus,promptingthenameDistrictofColumbiaforthelandsetasideastheU.S.capital.ColumbiaremainedapopularnamefortheUnitedStatesuntiltheearly20thcentury,whenitfellintorelativedisuse;butitisstillusedpoeticallyandappearsinvariousnamesandtitles.AfemalepersonificationofthecountryisalsocalledColumbia;sheissimilartoBritannia.[4][5][6][7]ColumbusDay,aholidayintheU.S.andothercountriesintheAmericascommemoratingColumbus'October1492landing.

ThetermunitedStatesofAmericawasfirstusedofficiallyintheDeclarationofIndependence,adoptedon4July1776.On15November1777,theSecondContinentalCongressadoptedtheArticlesofConfederation,thefirstofwhichstatedTheStileofthisConfederacyshallbe'TheUnitedStatesofAmerica.'

TheadjectivalanddemonymicformsfortheUnitedStatesareAmerican,apointofcontroversyamongsome.