SymbolsinEnglish符号英文.docx

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SymbolsinEnglish符号英文.docx

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SymbolsinEnglish符号英文.docx

SymbolsinEnglish符号英文

数学符号英文说法和发音大全！

！

各路出国党不妨看过来！

作者：

Symbols

plus

/'plʌs/

minus

/'maɪnəs/

plusorminus

/'plʌsɔ:

'maɪnəs/

multipliedby

/'mʌltɪplaɪdbaɪ/

over;dividedby

/'əʊvə//dɪ'vaɪdəd/

divided

/dɪ'vaɪdəd/

equals

/'ɪ:

kwəlz/

≈

approximately,similar

/ə'prɒksɪmətlɪ//'sɪmɪlətʊ/

≡

equivalentto;identical

/ɪk'wɪvələnttʊ//aɪ'dentɪkltʊ/

≠

notequalto

/'nɒt'iːkwəltʊ/

greaterthan

/'greɪtəðən/

lessthan

/'lesðən/

≥

greaterthanorequalto

/'greɪtəðənər'iːkwəltʊ/

≤

lessthanorequalto

/'lesðənər'iːkwəltʊ/

⊁

notgreaterthan

/'nɒt'greɪtəðən/

⊀

notlessthan

/'nɒt'lesðən/

≫

muchgreaterthan

/'mʌʧ'greɪtəðən/

≪

muchlessthan

/'mʌʧ'lesðən/

⊥

perpendicularto

/pɜːpən'dɪkjʊlətʊ/

∣∣

parallelto

/'pærəleltʊ/

≢

notequivalentto,notidenticalto

/'nɒtɪk'wɪvələnttʊ//'nɒtaɪ'dentɪkltʊ/

≄≉

notsimilarto

/'nɒt'sɪmɪlətʊ/

squared

/'skweəd/

cubed

/'kju:

bd/

tothefourth;tothepowerfour

/təðə'fɔːθ//teðə'pɑʊəfɔː/

tothen;tothenth;tothepowern

/təðɪen;tədɪenθ;təðəpɑʊəren/

√

root;squareroot

/ru:

t//skweəru:

∛

cuberoot

/kju:

bru:

∜

fourthroot

/fɔːθruːt/

factorial

/fæk'tɔːrɪəl/

percent

/pə'sent/

∞

infinity

/ɪn'fɪnətɪ/

∝

variesas;proportionalto

/'vɛərɪz//prə'pɔːʃənəl/

dot

/dɒt/

doubledot

/dʌbldɒt/

isto,ratioof

/reɪʃɪəʊ/

f（x）fx

f;function

/ef//'fʌŋkʃən/

f'（x）

fdash;derivative

/dæʃ//dɪ'rɪvətɪv/

f''x

fdouble-dash;secondderivative

/'dʌbldæʃ//'sekənddɪ'rɪvətɪv/

f'''（x）

ftriple-dash;ftreble-dash;thirdderivative

/'trɪpldæʃ//trebldæʃ//θɜ:

ddɪ'rɪvətɪv/

f（4）

ffour;fourthderivative

/fɔːθdɪ'rɪvətɪv/

∂

partialderivative,delta

/paːʃəldɪ'rɪvətɪv//deltə/

∫

integral

/'ɪntɪgrəl/

∑

sum

/sʌm/

w.r.t.

withrespectto

/wɪð'rɪspekt/

log

/lɒg/

log₂x

logtothebase2ofx

/lɒgtəðəbeɪstu:

əveks/

∴

therefore

/'ðɛəfɔː/

∵

because

/bɪ'kɒz/

→

gives,leadsto,approaches

/gɪvz//li:

dztʊ//əprəʊʧəz/

per

/pɜ:

∈

belongsto;amemberof;anelementof

/bɪ'lɒŋz//'membə//'elɪmənt/

∉

doesnotbelongto;isnotamemberof;isnotanelementof

/nɒtbɪ'lɒŋ//nɒtə'membə//nɒtən'elɪmənt/

⊂

containedin;apropersubsetof

/kən'teɪndɪn//'prɒpə'sʌbset/

⊆

containedin;subset

/'sʌbset/

⋂

intersection

/'ɪntəsekʃən/

⋃

union

/'juːnɪən/

∀

forall

/fərɔ:

cosx

cosx;cosinex

/kɒz/

sinx

sinex

/saɪn/

tanx

tangentx

/tan/

cosecx

/'kəʊsek/

sinhx

shinex

/'ʃaɪn/

coshx

/'kɒʃ/

tanhx

thanx

/θæn/

|x|

modx;modulusx

/mɒd//'mɒdjʊləs/

℃

degreesCentigrade

/dɪ'gri:

z'sentɪgreɪd/

℉

degreesFahrenheit

/dɪ'gri:

z'færənhaɪt/

°K

degreesKelvin

/dɪ'gri:

z'kelvɪn/

0°K,–273.15°C

absolutezero

/absəlu:

tzi:

rəʊ/

millimetre

/'mɪlɪmiːtə/

centimetre

/'sentɪmiːtə/

cc,cm³

cubiccentimetre,centimetrecubed

/'kjuːbɪk'sentɪmiːtə//'sentɪmiːtə'kju:

bd/

metre

/'miːtə/

kilometre

/kɪ'lɒmɪtə/

milligram

/'mɪlɪgræm/

gram

/græm/

kilogram

/'kɪləgræm/

A.C.

/eɪsi:

D.C.

/di:

si:

Examples

x+1

xplusone

x-1

xminusone

x±1

xplusorminusone

xy;xtimesy;xmultipliedbyy

（x—y）（x+y）

xminusy,xplusy

x/y

xovery;xdividedbyy;

x÷y

xdividedbyy

x=5

xequals5;xisequalto5

x≈y

xisapproximatelyequaltoy

x≡y

xisequivalenttoy;xisidenticalwithy

x≠y

xisnotequaltoy

x>y

xisgreaterthany

xislessthany

x≥y

xisgreaterthanorequaltoy

x≤y

xislessthanorequaltoy

zeroislessthanxislessthan1;xisgreaterthanzeroandlessthan1

0≤x≤1

zeroislessthanorequaltoxislessthanorequalto1;xisgreaterthanorequaltozeroandlessthanorequalto1

x²

xsquared

x³

xcubed

xtothefourth;xtothepowerfour

xtothen;xtothenth;xtothepowern

x-n

xtotheminusn;xtothepowerofminusn

√

rootx;squarerootx;thesquarerootofx

∛

thecuberootofx

∜

thefourthrootofx

thenthrootofx

（x+y）²

xplusyallsquared

（x/y）²

xoveryallsquared

nfactorial;factorialn

xpercent

∞

infinity

x∝y

xvariesasy;xis（directly）proportionaltoy

x∝1/y

xvariesasoneovery;xisindirectlyproportionaltoy

ẋ

xdot

ẍ

xdoubledot

f（x）fx

fofx;thefunctionofx

f'（x）

fdashx;the（first）derivativeofwithrespecttox

f''x

fdouble-dashx;thesecondderivativeoffwithrespecttox

f'''（x）

ftriple-dashx;ftreble-dashx;thethirdderivativeoffwithrespecttox

f（4）

ffourx;thefourthderivativeoffwithrespecttox

∂v

thepartialderivativeofv

∂v∂θ

deltavbydeltatheta,thepartialderivativeofvwithrespecttoθ

∂²v∂θ²

deltatwovbydeltathetasquared;thesecondpartialderivativeofvwithrespecttoθ

thederivativeofv

dvdθ

dvbydtheta,thederivativeofvwithrespecttotheta

d²vdθ²

d2vbydthetasquared,thesecondderivativeofvwithrespecttotheta,

∫

integral

integralfromzerotoinfinity

∑

sum

thesumfromiequals1ton

w.r.t.

withrespectto

logey

logtothebaseeofy;logytothebasee;naturallog（of）y

∴

therefore

∵

because

→

gives,approaches

Δx→0

deltaxapproacheszero

limΔx→0

thelimitasdeltaxapproacheszero,thelimitasdeltaxtendstozero

LtΔx→0

thelimitasdeltaxapproacheszero,thelimitasdeltaxtendstozero

m/sec

metrespersecond

x∈A

xbelongstoA;xisamemberofA;xisanelementofA

x∉A

xdoesnotbelongtoA;xisnotamemberofA;xisnotanelementofA

A⊂B

AiscontainedinB;AisapropersubsetofB

A⊆B

AiscontainedinB;AisasubsetofB

A⋂B

AintersectionB

A⋃B

AunionB

cosx

cosx;cosinex

sinx

sinex

tanx

tangentx,tanx

cosecx

sinhx

shinex

coshx

tanhx

thanx

|x|

modx;modulusx

18℃

eighteendegreesCentigrade

70℉

seventydegreesFahrenheit

Greekalphabet

alpha

/'ælfə/

beta

/'bi:

tə/

gamma

/'gæmə/

delta

/'deltə/

epsilon

/'epsilən/

zeta

/'ziːtə/

eta

/'iːtə/

theta

/'θiːtə/

iota

/aɪ'əʊtə/

kappa

/'kæpə/

lamda

/'læmdə/

/'mjuː/

/'njuː/

/'ksaɪ/

omicron

/'əʊmɪkrən/

/'paɪ/

ρς

rho

/'rəʊ/

sigma

/'sɪgmə/

tau

/'tɑʊ/

upsilon

/'jʊpsɪlən/

phi

/'faɪ/

chi

/'kaɪ/

psi

/'psaɪ/

omega

/'əʊmɪgə/

Romanalphabet

/'eɪ/

/'biː/

/'siː/

/'diː/

/'iː/

/'ef/

/'ʤiː/

/'eɪʧ/

/'aɪ/

/'ʤeɪ/

/'keɪ/

/'el/

/'em/

/'en/

/'əʊ/

/'piː/

/'kjuː/

/'ɑː/

/'es/

/'ti:

/'ju:

/'vi:

/'dʌbljuː/

/'eks/

/'waɪ/

/'zed/

Fractions

ahalf

/ə'hɑ:

aquarter

/ə'kwɔːtə/

threequarters

/θriː'kwɔːtəz/

⅓

athird

/ə'θɜ:

⅔

twothirds

/tu:

'θɜ:

dz/

⅕

afifth

/ə'fɪfθ/

⅖

twofifths

/tu:

'fɪfθs/

⅗

threefifths

/θriː'fɪfθs/

⅘

fourfifths

/fɔː'fɪfθs/

⅙

asixth

/ə'sɪksθ/

⅚

fivesixths

/faɪv'sɪksθs/

⅛

aneighth

/ən'eɪtθ/

⅜

threeeighths

/θriː'eɪtθs/

⅝

fiveeighths

/faɪv'eɪtθs/

⅞

seveneighths

/sevən'eɪtθs/

DecimalFractions

0.1

noughtpointone

/nɔ:

tpɔɪntwʌn/

0.01

noughtpointohone

/nɔ:

tpɔɪntəʊwʌn/

0.0001

noughtpointohohohone

/tenpɔɪntəʊəʊəʊwʌn/

1.1

onepointone

/wʌnpɔɪntwʌn/

1.2

onepointtwo

/wʌnpɔɪnttu:

1.23

onepointtwothree

/wʌnpɔɪnttu:

θri:

1.0123

onepointohonetwothree

/wʌnpɔɪntəʊwʌntu:

θri:

10.01

tenpointohone

/tenpɔɪntəʊwʌn/

21.57

twenty-onepointfiveseven

/'twentɪwʌnpɔɪntfaɪv'sevən/

2.6666666666....

twopointsixrecurring

/tu:

pɔɪntsɪksrɪ'kɜ:

rɪŋ/

2.612361236123...

twopointsixonetwothreerecurring

/tu:

pɔɪntsɪkswʌntu:

θri:

rɪ'kɜ:

rɪŋ/

2.5million

twopointfivemillion

/tu:

pɔɪntfaɪv'mɪljən/

SIUnits:

Prefixes

10-24

yocto

/'jɒktəʊ/

10-21

zepto

/'zeptəʊ/

10-18

atto

/'atəʊ/

10-15

femto

/'femtəʊ/

10-12

pico

/'pi:

kəʊ/

10-9

nano

/'nanəʊ/

10-6

micro

/'maɪkrəʊ/

10-3

milli

/'mɪlɪ/

10-2

centi

/'sentɪ/

10-1

deci

/'desɪ/

103

kilo

/'kɪləʊ/

106

mega

/'megə/

109

giga

/'gɪgə/

1012

tera

/'terə/

1015

peta

/'petə/

1018

exa

/'eksə/

1021

zetta

/'zetə/

1024

yotta

/'jɒtə/

1027

xona

/'zəʊnə/

1030

weka

/'wekə/

1033

vunda

/'vʊndə/

CardinalNumbers

one

/wʌn/

two

/tu:

three

/θri:

four

/fɔː/

five

/faɪv/

six

/sɪks/

seven

/'sevən/

eight

/eɪt/

nine

/naɪn/

ten

/ten/

eleven

/ɪ'levən/

twelve

/twelv/

thirteen

/θɜ:

'ti:

fourteen

/fɔː'ti:

fifteen

/fɪf'ti:

sixteen

/sɪkst'i:

seventeen

/seven'ti:

eighteen

/eɪ'ti:

nineteen

/naɪn'ti:

twenty

/'twentɪ/

twenty-one

/twentɪ'wʌn/

twenty-two

/twentɪ'tu:

twenty-three

/twentɪ'θri:

twenty-four

/twentɪ'fɔː/

twenty-five

/twentɪ'faɪv/

twenty-six

/twentɪ'sɪks/

twenty-seven

/twentɪ'sevən/

twenty-eight

/twentɪ'eɪt/

twenty-nine

/twentɪ'naɪn/

thirty

/'θɜ:

tɪ/

forty

/'fɔːtɪ/

fifty

/'fɪftɪ/

sixty

/'sɪkstɪ/

seventy

/'sevəntɪ/

eighty

/'eɪtɪ/

ninety

/'naɪntɪ/

100

ahundred;onehundred

/ə'hʌndrəd//wʌn'hʌndrəd/

101

ahundredandone

/ə'hʌndrədənwʌn/

102

ahundredandtwo

/ə'hʌndrədəntu:

110

ahundredandten

/ə'hʌndrədənten/

120

ahundredandtwenty

/ə

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