Symbols in English符号英文.docx
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Symbols in English符号英文.docx
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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:
孙鹏
Symbols
+
plus
/'plʌs/
-
minus
/'maɪnəs/
±
plusorminus
/'plʌsɔ:
'maɪnəs/
x
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/
²
squared
/'skweəd/
³
cubed
/'kju:
bd/
4
tothefourth;tothepowerfour
/təðə'fɔːθ//teðə'pɑʊəfɔː/
n
tothen;tothenth;tothepowern
/təðɪen;tədɪenθ;təðəpɑʊəren/
√
root;squareroot
/ru:
t//skweəru:
t/
∛
cuberoot
/kju:
bru:
t/
∜
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
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:
l/
cosx
cosx;cosinex
/kɒz/
sinx
sinex
/saɪn/
tanx
tangentx
/tan/
cosecx
cosecx
/'kəʊsek/
sinhx
shinex
/'ʃaɪn/
coshx
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/
mm
millimetre
/'mɪlɪmiːtə/
cm
centimetre
/'sentɪmiːtə/
cc,cm³
cubiccentimetre,centimetrecubed
/'kjuːbɪk'sentɪmiːtə//'sentɪmiːtə'kju:
bd/
m
metre
/'miːtə/
km
kilometre
/kɪ'lɒmɪtə/
mg
milligram
/'mɪlɪgræm/
g
gram
/græm/
kg
kilogram
/'kɪləgræm/
AC
A.C.
/eɪsi:
/
DC
D.C.
/di:
si:
/
Examples
x+1
xplusone
x-1
xminusone
x±1
xplusorminusone
xy
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
x xislessthany x≥y xisgreaterthanorequaltoy x≤y xislessthanorequaltoy 0 zeroislessthanxislessthan1;xisgreaterthanzeroandlessthan1 0≤x≤1 zeroislessthanorequaltoxislessthanorequalto1;xisgreaterthanorequaltozeroandlessthanorequalto1 x² xsquared x³ xcubed x4 xtothefourth;xtothepowerfour xn xtothen;xtothenth;xtothepowern x-n xtotheminusn;xtothepowerofminusn √ rootx;squarerootx;thesquarerootofx ∛ thecuberootofx ∜ thefourthrootofx thenthrootofx (x+y)² xplusyallsquared (x/y)² xoveryallsquared n! nfactorial;factorialn x% 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 dv 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 cosecx sinhx shinex coshx coshx tanhx thanx |x| modx;modulusx 18℃ eighteendegreesCentigrade 70℉ seventydegreesFahrenheit Greekalphabet Α α alpha /'ælfə/ Β β beta /'bi: tə/ Γ γ gamma /'gæmə/ Δ δ delta /'deltə/ Ε ε epsilon /'epsilən/ Ζ ζ zeta /'ziːtə/ Η η eta /'iːtə/ Θ θ theta /'θiːtə/ Ι ι iota /aɪ'əʊtə/ Κ κ kappa /'kæpə/ Λ λ lamda /'læmdə/ Μ μ mu /'mjuː/ Ν ν nu /'njuː/ Ξ ξ xi /'ksaɪ/ Ο ο omicron /'əʊmɪkrən/ Π π pi /'paɪ/ Ρ ρς rho /'rəʊ/ Σ σ sigma /'sɪgmə/ Τ τ tau /'tɑʊ/ Υ υ upsilon /'jʊpsɪlən/ Φ φ phi /'faɪ/ Χ χ chi /'kaɪ/ Ψ ψ psi /'psaɪ/ Ω ω omega /'əʊmɪgə/ ^ Romanalphabet A a /'eɪ/ B b /'biː/ C c /'siː/ D d /'diː/ E e /'iː/ F f /'ef/ G g /'ʤiː/ H h /'eɪʧ/ I i /'aɪ/ J j /'ʤeɪ/ K k /'keɪ/ L l /'el/ M m /'em/ N n /'en/ O o /'əʊ/ P p /'piː/ Q q /'kjuː/ R r /'ɑː/ S s /'es/ T t /'ti: / U u /'ju: / V v /'vi: / W w /'dʌbljuː/ X x /'eks/ Y y /'waɪ/ Z z /'zed/ ^ Fractions ½ ahalf /ə'hɑ: f/ ¼ aquarter /ə'kwɔːtə/ ¾ threequarters /θriː'kwɔːtəz/ ⅓ athird /ə'θɜ: d/ 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 y /'jɒktəʊ/ 10-21 zepto z /'zeptəʊ/ 10-18 atto a /'atəʊ/ 10-15 femto f /'femtəʊ/ 10-12 pico p /'pi: kəʊ/ 10-9 nano n /'nanəʊ/ 10-6 micro µ /'maɪkrəʊ/ 10-3 milli m /'mɪlɪ/ 10-2 centi c /'sentɪ/ 10-1 deci d /'desɪ/ 103 kilo k /'kɪləʊ/ 106 mega M /'megə/ 109 giga G /'gɪgə/ 1012 tera T /'terə/ 1015 peta P /'petə/ 1018 exa E /'eksə/ 1021 zetta Z /'zetə/ 1024 yotta Y /'jɒtə/ 1027 xona X /'zəʊnə/ 1030 weka W /'wekə/ 1033 vunda V /'vʊndə/ ^ CardinalNumbers 1 one /wʌn/ 2 two /tu: / 3 three /θri: / 4 four /fɔː/ 5 five /faɪv/ 6 six /sɪks/ 7 seven /'sevən/ 8 eight /eɪt/ 9 nine /naɪn/ 10 ten /ten/ 11 eleven /ɪ'levən/ 12 twelve /twelv/ 13 thirteen /θɜ: 'ti: n/ 14 fourteen /fɔː'ti: n/ 15 fifteen /fɪf'ti: n/ 16 sixteen /sɪkst'i: n/ 17 seventeen /seven'ti: n/ 18 eighteen /eɪ'ti: n/ 19 nineteen /naɪn'ti: n/ 20 twenty /'twentɪ/ 21 twenty-one /twentɪ'wʌn/ 22 twenty-two /twentɪ'tu: / 23 twenty-three /twentɪ'θri: / 24 twenty-four /twentɪ'fɔː/ 25 twenty-five /twentɪ'faɪv/ 26 twenty-six /twentɪ'sɪks/ 27 twenty-seven /twentɪ'sevən/ 28 twenty-eight /twentɪ'eɪt/ 29 twenty-nine /twentɪ'naɪn/ 30 thirty /'θɜ: tɪ/ 40 forty /'fɔːtɪ/ 50 fifty /'fɪftɪ/ 60 sixty /'sɪkstɪ/ 70 seventy /'sevəntɪ/ 80 eighty /'eɪtɪ/ 90 ninety /'naɪntɪ/ 100 ahundred;onehundred /ə'hʌndrəd//wʌn'hʌndrəd/ 101 ahundredandone /ə'hʌndrədənwʌn/ 102 ahundredandtwo /ə'hʌndrədəntu: / 110 ahundredandten /ə'hʌndrədənten/ 120 ahundredandtwenty /ə'hʌndrədən'twentɪ/ 200 twohundred /tu: 'hʌndrəd/
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