初中生英语演讲三分钟VIP专享VIP免费

下载后可任意编辑初中生英语演讲三分钟初中生英语演讲三分钟篇一ihavetheanswertoaquestionthatweveallasked.thequestionis,whyisitthattheletterxrepresentstheunknown?nowiknowwelearnedthatinmathclass,butnowitseverywhereintheculture--thexprize,thex-files,projectx,tedx.wheredthatcomefrom?aboutsixyearsagoidecidedthatiwouldlearnarabic,whichturnsouttobeasupremelylogicallanguage.towriteawordoraphraseorasentenceinarabicislikecraftinganequation,becauseeverypartisextremelypreciseandcarriesalotofinformation.thatsoneofthereasonssomuchofwhatwevecometothinkofaswesternscienceandmathematicsandengineeringwasreallyworkedoutinthefirstfewcenturiesofthecommonerabythepersiansandthearabsandtheturks.thisincludesthelittlesysteminarabiccalledal-jebra.andal-jebrroughlytranslatestothesystemforreconcilingdisparateparts.al-jebrfinallycameintoenglishasalgebra.oneexample下载后可任意编辑amongmany.thearabictextscontainingthismathematicalwisdomfinallymadetheirwaytoeurope--whichistosayspain--inthe11thand12thcenturies.andwhentheyarrivedtherewastremendousinterestintranslatingthiswisdomintoaeuropeanlanguage.buttherewereproblems.oneproblemistherearesomesoundsinarabicthatjustdontmakeitthroughaeuropeanvoiceboxwithoutlotsofpractice.trustmeonthatone.also,thoseverysoundstendnottoberepresentedbythecharactersthatareavailableineuropeanlanguages.初中生英语演讲三分钟篇二heresoneoftheculprits.thisisthelettersheen,anditmakesthesoundwethinkofassh--sh.itsalsotheveryfirstletterofthewordshalan,whichmeanssomethingjustlikethetheenglishwordsomething--someundefined,unknownthing.nowinarabic,wecanmakethisdefinitebyaddingthedefinitearticleal.sothisisal-shalan--theunknownthing.andthisisawordthatappearsthroughoutearlymathematics,suchas下载后可任意编辑this10thcenturyderivationofproofs.theproblemforthemedievalspanishscholarswhoweretaskedwithtranslatingthismaterialisthatthelettersheenandthewordshalancantberenderedintospanishbecausespanishdoesnthavethatsh,thatshsound.sobyconvention,theycreatedaruleinwhichtheyborrowedthecksound,cksound,fromtheclassicalgreekintheformoftheletterkai.laterwhenthismaterialwastranslatedintoacommoneuropeanlanguage,whichistosaylatin,theysimplyreplacedthegreekkaiwiththelatinx.andoncethathappened,oncethismaterialwasinlatin,itformedthebasisformathematicstextbooksforalmost600years.butnowwehavetheanswertoourquestion.whyisitthatxistheunknown?xistheunknownbecauseyoucantsayshinspanish.(laughter)andithoughtthatwasworthsharing.初中生英语演讲三分钟篇三campwasmorelikeakegpartywithoutanyalcohol.andontheveryfirstdayourcounselorgatheredusalltogether下载后可任意编辑andshetaughtusacheerthatshesaidwewouldbedoingeverydayfortherestofthesummertoinstillcampspirit.anditwentlikethis:r-o-w-d-i-e,thatsthewaywespellrowdie.rowdie,rowdie,letsgetrowdie.yeah.soicouldntfigureoutforthelifeofmewhyweweresupposedtobesorowdy,orwhywehadtospellthiswordincorrectly.(laughter)butirecitedacheer.irecitedacheeralongwitheverybodyelse.ididmybest.andijustwaitedforthetimethaticouldgooffandreadmybooks.butthefirsttimethatitookmybookoutofmysuitcase,thecoolestgirlinthebunkcameuptomeandsheaskedme,whyareyoubeingsomellow?--mellow,ofcourse,beingtheexactoppositeofr-o-w-d-i-e.andthenthesecondtimeitriedit,thecounselorcameuptomewithaconcernedexpressiononherfaceandsherepeatedthepointaboutcampspiritandsaidweshouldallworkveryhardtobeoutgoing.andsoiputmybooksaway,backintheirsuitcase,andiputthemundermybed,andthere下载后可任意编辑theystayedfortherestofthesummer.andifeltkindofguiltyaboutthis.ifeltasifthebooksneededmesomehow,andtheywerecallingouttomeandiwasforsakingthem.butididforsakethemandididntopenthatsuitcaseagainuntiliwasbackhomewithmyfamilyattheendofthesummer.now,itellyouthisstoryaboutsummercamp.icouldhavetoldyou50othersjustlikeit--allthetimesthatigotthemessagethatsomehowmyquietandintrovertedstyleofbeingwasnotnecessarilytherightwaytogo,thatishouldbetryingtopassasmoreofanextrovert.andialwayssenseddeepdownthatthiswaswrongandthatintrovertswereprettyexcellentjustastheywere.butforyearsideniedthisintuition,andsoibecameawallstreetlawyer,ofallthings,insteadofthewriterthatihadalwayslongedtobe--partlybecauseineededtoprovetomyselfthaticouldbeboldandassertivetoo.andiwasalwaysgoingofftocrowdedbarswhenireallywouldhavepreferredtojusthaveanicedinnerwithfriends.andimadetheseself-negating下载后可任意编辑choicessoreflexively,thatiwasntevenawarethatiwasmakingthem.初中生英语演讲三分钟