初中生英语演讲三分钟

参考资料，少熬夜！初中生英语演讲三分钟初中生英语演讲三分钟1我有一个我们都问过的问题的答案。问题是，为什么字母x代表未知？我知道我们在数学课上学到了这一点，但现在它在文化中无处不在——x奖，x档案，x项目，tedx.那是从哪里来的？aboutsixyearsagoidecidedthatiwouldlearnarabic,whichturnsouttobeasupremelylogicallanguage.towriteawordoraphraseorasentenceinarabicislikecraftinganequation,becauseeverypartisextremelypreciseandcarriesalotofinformation.that'soneofthereasonssomuchofwhatwe'vecometothinkofaswesternscienceandmathematicsandengineeringwasreallyworkedoutinthefirstfewcenturiesofthecommonerabythepersiansandthearabsandtheturks.thisincludesthelittlesysteminarabiccalledal-jebra.andal-jebrroughlytranslatesto“thesystemforreconcilingdisparateparts.“al-jebrfinallycameintoenglishasalgebra.oneexampleamongmany.thearabictextscontainingthismathematicalwisdomfinallymadetheirwaytoeurope--whichistosayspain--inthe11thand12thcenturies.andwhentheyarrivedtherewastremendousinterestintranslatingthiswisdomintoaeuropeanlanguage.buttherewereproblems.oneproblemistherearesomesoundsinarabicthatjustdon'tmakeitthroughaeuropeanvoiceboxwithoutlotsofpractice.trustmeonthatone.also,thoseverysoundstendnottoberepresentedbythecharactersthatareavailableineuropeanlanguages.初中生英语演讲三分钟2here'soneoftheculprits.thisisthelettersheen,anditmakesthesoundwethinkofassh--“sh.“it'salsotheveryfirstletterofthewordshalan,whichmeans“something“justlikethetheenglishword“something“--someundefined,unknownthing.nowinarabic,wecanmakethisdefinitebyaddingthedefinitearticle“al.“sothisisal-shalan--theunknownthing.andthisisawordthatappearsthroughoutearlymathematics,suchasthis10thcenturyderivationofproofs.theproblemforthemedievalspanishscholarswhoweretaskedwithtranslatingthismaterialisthatthe参考资料，少熬夜！lettersheenandthewordshalancan'tberenderedintospanishbecausespanishdoesn'thavethatsh,that“sh“sound.sobyconvention,theycreatedaruleinwhichtheyborrowedthecksound,“ck“sound,fromtheclassicalgreekintheformoftheletterkai.laterwhenthismaterialwastranslatedintoacommoneuropeanlanguage,whichistosaylatin,theysimplyreplacedthegreekkaiwiththelatinx.andoncethathappened,oncethismaterialwasinlatin,itformedthebasisformathematicstextbooksforalmost600years.butnowwehavetheanswertoourquestion.whyisitthatxistheunknown?xistheunknownbecauseyoucan'tsay“sh“inspanish.(laughter)andithoughtthatwasworthsharing.初中生英语演讲三分钟3campwasmorelikeakegpartywithoutanyalcohol.andontheveryfirstdayourcounselorgatheredusalltogetherandshetaughtusacheerthatshesaidwewouldbedoingeverydayfortherestofthesummertoinstillcampspirit.anditwentlikethis:“r-o-w-d-i-e,that'sthewaywespellrowdie.rowdie,rowdie,let'sgetrowdie.“yeah.soicouldn'tfigureoutforthelifeofmewhyweweresupposedtobesorowdy,orwhywehadtospellthiswordincorrectly.(laughter)butirecitedacheer.irecitedacheeralongwitheverybodyelse.ididmybest.andijustwaitedforthetimethaticouldgooffandreadmybooks.butthefirsttimethatitookmybookoutofmysuitcase,thecoolestgirlinthebunkcameuptomeandsheaskedme,“whyareyoubeingsomellow?“--mellow,ofcourse,beingtheexactoppositeofr-o-w-d-i-e.andthenthesecondtimeitriedit,thecounselorcameuptomewithaconcernedexpressiononherfaceandsherepeatedthepointaboutcampspiritandsaidweshouldallworkveryhardtobeoutgoing.andsoiputmybooksaway,backintheirsuitcase,andiputthemundermybed,andtheretheystayedfortherestofthesummer.andifeltkindofguiltyaboutthis.ifeltasifthebooksneededmesomehow,andtheywerecallingouttomeandiwasforsakingthem.butididforsakethemandididn'topenthatsuitcaseagainuntiliwasbackhomewithmyfamilyattheendofthesummer.now,itellyouthisstoryaboutsummercamp.icouldhavetoldyou50othersjustlikeit--allthetimesthat参考资料，少熬夜！igotthemessagethatsomehowmyquietandintrovertedstyleofbeingwasnotnecessarilytherightwaytogo,thatishouldbetryingtopassasmoreofanextrovert.andialwayssenseddeepdownthatthiswaswrongandthatintrovertswereprettyexcellentjustastheywere.butforyearsideniedthisintuition,andsoibecameawallstreetlawyer,ofallthings,insteadofthewriterthatihadalwayslongedtobe--partlybecauseineededtoprovetomyselfthaticouldbeboldandassertivetoo.andiwasalwaysgoingofftocrowdedbarswhenireallywouldhavepreferredtojusthaveanicedinnerwithfriends.andimadetheseself-negatingchoicessoreflexively,thatiwasn'tevenawarethatiwasmakingthem.