ted英语演讲稿：为什么x代表未知？

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1、TED英语演讲稿：为什么X代表未知？　　ihavetheanswertoaquestionthatwe'veallasked.thequestionis,whyisitthattheletterxrepresentstheunknown?nowiknowwelearnedthatinmathclass,butnowit'severywhereintheculture--thexprize,thex-files,projectx,tedx.where'dthatcomefrom?　　aboutsixyearsagoidecidedthatiwouldlearnarabic,whichturns

2、outtobeasupremelylogicallanguage.towriteawordoraphraseorasentenceinarabicislikecraftinganequation,becauseeverypartisextremelypreciseandcarriesalotofinformation.that'soneofthereasonssomuchofwhatwe'vecometothinkofaswesternscienceandmathematicsandengineeringwasreallyworkedoutinthefirstfewcenturiesofth

3、ecommonerabythepersiansandthearabsandtheturks.　　thisincludesthelittlesysteminarabiccalledal-jebra.andal-jebrroughlytranslatesto"thesystemforreconcilingdisparateparts."al-jebrfinallycameintoenglishasalgebra.oneexampleamongmany.　　thearabictextscontainingthismathematicalwisdomfinallymadetheirwaytoeuro

4、pe--whichistosayspain--inthe11thand12thcenturies.andwhentheyarrivedtherewastremendousinterestintranslatingthiswisdomintoaeuropeanlanguage.　　buttherewereproblems.oneproblemistherearesomesoundsinarabicthatjustdon'tmakeitthroughaeuropeanvoiceboxwithoutlotsofpractice.trustmeonthatone.also,thoseverysoun

5、dstendnottoberepresentedbythecharactersthatareavailableineuropeanlanguages.　　here'soneoftheculprits.thisisthelettersheen,anditmakesthesoundwethinkofassh--"sh."it'salsotheveryfirstletterofthewordshalan,whichmeans"something"justlikethetheenglishword"something"--someundefined,unknownthing.　　nowinarabi

6、c,wecanmakethisdefinitebyaddingthedefinitearticle"al."sothisisal-shalan--theunknownthing.andthisisawordthatappearsthroughoutearlymathematics,suchasthis10thcenturyderivationofproofs.　　theproblemforthemedievalspanishscholarswhoweretaskedwithtranslatingthismaterialisthatthelettersheenandthewordshalanc

7、an'tberenderedintospanishbecausespanishdoesn'thavethatsh,that"sh"sound.sobyconvention,theycreatedaruleinwhichtheyborrowedthecksound,"ck"sound,fromtheclassicalgreekintheformoftheletterkai.　　laterwhenthismate