各种符号英语读法

常用的数学符号英文读法一般符号对应的英文单词．period句号，comma逗号：colon冒号；semicolon分号！exclamation惊叹号？questionmark问号─hyphen连字符’apostrophe省略号；所有格符号—dash破折号‘’singlequotationmarks单引号“”doublequotationmarks双引号()parentheses圆括号[]squarebrackets方括号《》Frenchquotes法文引号；书名号...ellipsis省略号¨tandemcolon双点号ditto同上‖parallel平行／virgule斜线号＆ampersand=and～swungdash代字号§section;division分节号→arrow箭号；参见号＋plus加号；正号－minus减号；负号±plusorminus正负号×ismultipliedbyorcross叉乘÷isdividedby除号＝isequalto等于号≠isnotequalto不等于号≡isequivalentto全等于号≌isequaltoorapproximatelyequalto等于或约等于号≈isapproximatelyequalto约等于号＜islessthan小于号＞ismorethan（isgreaterthan在数学中更常用）大于号≮isnotlessthan不小于号≯isnotmorethan不大于号≤islessthanorequalto小于或等于号≥ismorethanorequalto大于或等于号％percent百分之…‰permill千分之…∞infinity无限大号∝variesas与…成比例√(square)root平方根∵since;because因为∴hence所以∷equals,as(proportion)等于，成比例∠angle角⌒semicircle半圆⊙circle圆○circumference圆周πpi圆周率△triangle三角形⊥perpendicularto垂直于；另外normalto，rightto也都有垂直的意思。∪unionof并，合集∩intersectionof交，通集∫theintegralof…的积分∑(sigma)summationof总和°degree度′minute分″second秒＃pound…号∏pi.dot(点乘就是centereddot)f’fprimef撇A上面一个横杠：AbarA上面一个星星*：AasteriskA上面一个波浪线～：AtildeA的厄米共轭（注意不是加号，那个竖比横长）：Adagger（dagger：短剑，匕首）偏微分符号（不好意思，打不出来）有人把它读partial或者d但这样读都不正规，最正规读法为round因为这个符号是法国人发明的，一开始就叫round倒三角符号（不好意思，打不出来2）读作nabla或者del读nabla的居多，后者在某些英文书里会见到。nabla符号本身具有不同的功能，当它按不同的乘法规则作用于函数时会分别得到梯度：grandient符号为grad散度：divergence符号为div此时可直接读作grandient（divergence）of...二、一些函数关系的读法A与B的乘积the___productofAandB（___中填乘积的性质，例如外积就填outer，内积就填inner)A乘以BAtimesBorAismultipliedbyBA/BAoverBB分之A的最普通读法f(x)fofx函数f(x)exp(n)etopowersofne的n次幂三、PronunciationofNumerals数词的读法1.CardinalsandOrdinals基数和序数(1)100以内的数词基数序数RomanArabicNumeralsNumerals罗马数字阿拉伯数字读法数码读法I1one1stthefirstII2two2ndthesecondIII3three3rdthethirdIV4four4ththefourthV5five5ththefifthVI6six6ththesixthVII7seven7ththeseventhVIII8eight8ththeeighthIX9nine9ththeninthX10ten10ththetenthXI11eleven11ththeeleventhXII12twelve12ththetwelfthXIII13thirteen13ththethirteenthXIV14fourteen14ththefourteenthXV15fifteen15ththefifteenthXVI16sixteen16ththesixteenthXVII17seventeen17ththeseventeenthXVIII18eighteen18ththeeighteenthXIX19nineteen19ththenineteenthXX20twenty20ththetwentiethXXI21twenty-one21stthetwenty-firstXXV25twenty-five25ththetwenty-fifthXXX30thirty30ththethirtiethXL40forty40ththefortiethL50fifty50ththefiftiethLX60sixty60ththesixtiethLXX70seventy70ththeseventiethLXXX80eighty80ththeeightiethXC90ninety90ththeninetiethIC99ninety-nine99ththeninety-ninthC100onehundred100ththehundredthCII102ahundred102ndthe(one)hundredandtwoandsecond246twohundredandforty-six751sevenhundredandfifty-one(2)1000以上的数词1,000=onethousand一千10,000=tenthousand一万100,000=onehundredthousand十万1,000,000=onemillion一百万10,000,000=tenmillion一千万100,000,000=onehundredmillion一亿(3)十亿以上的大数，英美有不同的读法：英国美国十亿onethousandmillion=onebillion百亿tenthousandmillion=tenbillion千亿onehundredthousandmillion=onehundredbillion万亿onebillion=onetrillion2.Fractions分数通常将分子读为基数，将分母读为序数。1/2=a(orone)half1/3=a(orone)third1/4=aquarteroronefouth1/5=a(orone)fifth2/3=twothirds9/10=ninetenths53/4=fiveandthreequarters15/64=fifteenover(orby)sixty-four15%=fifteenpercent4‰=fourpermill3.Decimals小数0.4=zero(ornought)pointfour.01=point(ordecimal)noughtone12.34=twelvepointthreefour567.809=fivehundredandsixty-sevenpointeightnoughtnine30.45=thirtypointfourfive,fiverecurring0.3%=decimalthreepercent4.MathematicForms数学式(1)Addition加法1+2=3Oneandtwoarethree.2+3=5Twoplusthreeequalsfive.4+0=4Fourandnoughtisequaltofour.45+70+152=26745,70and152addedare(ormake)267thesum(ortotal)is267.演算时的读法：Threeandsevenareten;Iwrite(orIwritedown,orIputdown)anoughtandcarryone.FourandonethatIcarryarefive,andeightmakethirteen,andthreesixteen;Iwritedownsixandcarryone.Oneandone(thatIcarry)aretwo;Iputdowntwo.-Thesum(ortotal,ortheresultoftheaddition)istwohundredandsixty.37,80and143addedtogether,and(ormake)260.(2)Subtraction减法9-4=5Nineminusfourequals(orisequalto)five.15-7=8Sevenfromfifteenleaveseight.23,654-8,175=15,4798,175(takeorsubtracted)from23,654leaves15,479.Thedifference(orTheremainder)is15,479.Ninefromfivewon`tgo.演算时的读法：Noughtfromnought(leaves)nought.Onefromoneleavesnought(ornothing).Twofromthree(leaves)one.Ican`ttake(orsubtract)fivefromfour;Imustborrowten;fivefromfourteenleavesnine.-Thedifference(orTheremainder)isninethousandonehundred.5210(takeorsubstracted)from14,310leaves9,100.(3)Multiplication乘法1×0=0Onemultipliedbynoughtequalsnought.1×1=1Onceoneisone.2×1=2Twiceoneistwo.3×5=15Threetimesfiveisfifteen6×0=0Multiplysixbynothing,andtheresultisnothing.演算时的读法:Fivetimesnine(orNinemultipliedbyfive)areforty-five;Iputdownfiveandcarryfour.Fivetimessevenarethirty-fiveandfour(thatIcarry)arethirty-nine;Iwritedownnineandcarrythree.Fivetimessixmakethirtyandthree(thatIcarry)thirty-three;Iputdownthirty-three.Eighttimesnine(orEightnine)areseventwo;Iwritetwoandcarryseven.Eightsevensmakefifty-sixandsevenaresixty-three.Iputdownthreeandcarrysix.Eightsixesmakeforty-eightandsixfifty-four;Iwritedownfifty-four.Inowaddthepartialresults(orproducts)Five.Twoandnineareeleven.Threeandthreearesixandoneareseven.Fourandthreemakesev