单位符号的英语说法 -引用

1/2 = a (or one) half
1/3 = a (or one) third
1/4 = a quarter or one fourth
1/5 = a (or one) fifth
2/3 = two thirds
9/10 = nine tenths
53/4 = five and three quarters
15/64= fifteen over (or by) sixty-four
15% = fifteen per cent
4‰ = four per mill

R’ R prime
R” R double prime, R second prime
R1 R sub one
100° C one hundred degrees Centigrade
+ plus; positive
- minus; negative
´ multiplied by; times
¸ divided by
± plus or minus
= is equal to; equals
º is identically equal to
» is approximately equal to
( ) round brackets; parentheses
[ ] square brackets
{ } braces
a
＞＞b a is much greater than b
a³ b a is greater than or equal to b
aµ b a varies directly as b
lognX logX to the base n
the cubic root of x
the nth root of x
x2 x square, x squared, the square of x
Xn X to n factors; the nth power of x; x to the power n
x -8 x to the minus eighth power
ï xï the absolute value of x
the mean value of X
the sum of the terms indicated; summation of
D x or d x the increment of x
dx differential x
dy / dx the first derivative of y with respect to x
ò integral
¥ infinity
1/2 a half; one half
2/3 two thirds
5/123 five over a hundred and twenty-three
eight and three over fourths; eight and three quarters
0.01 O point O one; zero point zero one; nought point nought one
6 % 6 percent
3‰ 3 per mille
2 : 3 the ratio of two to three
r=xd r equals x multiplied by d
5´ 2=10 five times two equals ten
x3/8=y2 x raised to the third power divided by eight equals y squared
(a+b-c´ d)/e=f a plus b minus c multiplied by d, all divided by e equals f
y = (Wt-W)/x y equals W sub t minus W over x

~ tilde
# Pound(USA) / Hash(UK)
period 句号
≈ is approximately equal to

≤ is less than or equal to

≥ is more than or equal to

' apostrophe

- dash

‰ per mill

' ' single quotation marks

∞ infinity

double quotation marks

( ) parentheses

√ (square) root

[ ] square brackets

... ellipsis

¨ tandem colon

ditto

π pi

§ section; division

∫ the integral of …

± plus or minus

( ∑ sigma) summation of

× is multiplied by

° degree

÷ is divided by

′ minute
is equal to 等于号
″ second

≠ is not equal to

Pronunciation of Numerals 数词的读法
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1.Cardinals and Ordinals

(1)100

Roman Arabic
Numerals Numerals

I 1 one 1st the first
II 2 two 2nd the second
III 3 three 3rd the third
IV 4 four 4th the fourth
V 5 five 5th the fifth
VI 6 six 6th the sixth
VII 7 seven 7th the seventh
VIII 8 eight 8th the eighth
IX 9 nine 9th the ninth
X 10 ten 10th the tenth
XI 11 eleven 11th the eleventh
XII 12 twelve 12th the twelfth
XIII 13 thirteen 13th the thirteenth
XIV 14 fourteen 14th the fourteenth
XV 15 fifteen 15th the fifteenth
XVI 16 sixteen 16th the sixteenth
XVII 17 seventeen 17th the seventeenth
XVIII 18 eighteen 18th the eighteenth
XIX 19 nineteen 19th the nineteenth
XX 20 twenty 20th the twentieth
XXI 21 twenty-one 21st the twenty-first
XXV 25 twenty-five 25th the twenty-fifth
XXX 30 thirty 30th the thirtieth
XL 40 forty 40th the fortieth
L 50 fifty 50th the fiftieth
LX 60 sixty 60th the sixtieth
LXX 70 seventy 70th the seventieth
LXXX 80 eighty 80th the eightieth
XC 90 ninety 90th the ninetieth
IC 99 ninety-nine 99th the ninety-ninth
C 100 one hundred 100th the hundredth
CII 102 a hundred 102nd the (one) hundred
and two and second
246 two hundred and forty-six
751 seven hundred and fifty-one

(2)1000

1,000 = one thousand

10,000 = ten thousand

100,000 = one hundred thousand

1,000,000 = one million

10,000,000 = ten million

100,000,000=one hundred million

(3)

2.Fractions

1/2 = a (or one) half
1/3 = a (or one) third
1/4 = a quarter or one fouth
1/5 = a (or one) fifth
2/3 = two thirds
9/10 = nine tenths
53/4 = five and three quarters
15/64= fifteen over (or by) sixty-four
15% = fifteen per cent
4‰ = four per mill

3.Decimals

0.4 = zero (or nought) point four
.01 = point (or decimal) nought one
12.34 = twelve point three four
567.809 = five hundred and sixty-seven point eight nought nine
30.45 = thirty point four five, five recurring
0.3% = decimal three percent

4.Mathematic Forms

1+2=3 One and two are three.
2+3=5 Two plus three equals five.
4+0=4 Four and nought is equal to four.
45+70+152=267 45,70 and 152 added are (or make) 267
the sum (or total) is 267.

and carry one. Four and one that I carry are five, and eight make thirteen,and three
sixteen; I write down six and carry one. One and one (that I carry) are two; I put down
two.- The sum (or total, or the result of the addition) is two hundred and sixty. 37,80
and 143 added together, and(or make) 260.

(2)Subtraction

9-4=5 Nine minus four equals (or is equal to) five.
15-7=8 Seven from fifteen leaves eight.
23,654-8,175=15,479 8,175 (take or subtracted) from 23,654 leaves 15,479. The difference
(or The remainder) is 15,479.
Nine from five won`t go.

Two from three (leaves) one. I can`t take (or subtract) five from four; I must borrow ten;
five from fourteen leaves nine.- The difference (or The remainder) is nine thousand one
hundred. 5210 (take or substracted) from 14,310 leaves 9,100.

(3)Multiplication

1×0=0 One multiplied by nought equals nought.
1×1=1 Once one is one.
2×1=2 Twice one is two.
3×5=15 Three times five is fifteen
6×0=0 Multiply six by nothing, and the result is nothing.

and carry four. Five times seven are thirty-five and four (that I carry) are thirty-nine; I write
down nine and carry three. Five times six make thirty and three (that I carry) thirty-three; I put
down thirty-three.
Eight times nine (or Eight nine) are seven two; I write two and carry seven. Eight sevens make
fifty-six and seven are sixty-three. I put down three and carry six. Eight sixes make forty-eight
and six fifty-four; I write down fifty-four.
I now add the partial results (or products) Five. Two and nine are eleven. Three and three are
six and one are seven. Four and three make seven. Five.

(4)Division

9÷3=3 Nine divided by three maks (or is equal to) three.
20÷5=4 Five into twenty goes four times.
4567÷23=198
13 23 into 4567 goes 198 times, and 13 remainder.
The quctient is 198, and 13 remainder.

times; nine times fifteen are one hundred and threty-five; one hundred and thirty-five from one hundred
and thirty-eight leaves three; I bring down seven; fifteen into thirty-seven goes twice; twice fifteen
are thirty; thirty from thirty-seven leaves seven.
The (exact) quotient is ninety-two, and seven remainder; 15 into 1387 goes 92 times, and 7 remainder.

5.Time

(1)Hours

2h.5'8" = two hours five minutes eight seconds 2

6.18 = six eighteen 6
18
8.30 a.m.= eight thirty a.m.['ei 'em]

the 6.05 p.m.train = the six (nought) five p.m.['pi:'em] train

0900 = 0 nine hunderd (

0910 = 0 nine ten (

1300 = thirteen hundred 13
(下午1)
1525 = fifteen twenty-five 15
25(下午325)
2000 = twenty hundred 20
(下午8)
at 5 o'c =at five o'clock

(2)Date

Oct.1 =October first 10
1
Oct.1st = October the first 10
1
Ist Oct. 1949 = teh first of October, nineteen forty-nine 1949
101
3/5 = [
]May (the) third 53日；[]March fifth 35
[

(3)Year

684 B.C. =Six eighty-four B.C. ['bi:'si:]

1960 = nineteen sixty; nineteen hundred and sixty
19- nineteen something
1950's nineteen fifties

[

6.Numbers

(1)Telephones Numbers
电话号码
1023 = one O two three; ten twenty-three
1227 = one double two (or two two) seven
0386 = O three eight six
0096 = double O(or O O )nine six
7000 = seven O double O = seven thousand
No.26= Number 26
26
Room 201 = Room two O one
201房间
10 Changan Street = Ten Changan Street

(2)Writings

Vol.I = Volume one (or the first volume)

Chap.II= Chapter two (or the second chapter)
2
Page 3 = page Three (or the third page)
3
See pp.5-10 = See Pages five to ten

Act V = Act five (or the fifth act)
5
Hamlet III 1:56 = Hamlet Act Three, Secene One.Line fifty-six
《哈姆雷特》第3幕第一场第56
Matt.7:12 = Matthew, Chapter Seven, Verse Twelve
《马可福音》第七章第12
Beethoven Op.49 = Beethoven Opus forty-nine

4to = quarto

(3)Other

World War I = World War One

World War II = World War Two

Charles I= Charles the First

Henry V = Henry the Fifth

Mr.- = Mr. Dash; Mr. So-and-so

Mr.B - = Mr. B
-Esq.,of -= the town of Blank Esquire of Blank University

the town of = the town of Blank

The result of the game was 3-0

7.Money

(1)British currency

6d. = six pence

1/2d. = a halfpenny

11/2d. = a peney halfpenny or three halfpeny or three halfpence

1/4d. = a farthing

33/4d.= three pence three farghings

1s.6d.(or 1/6) = one (shilling) and six (pence)

4/51/2(or4s.51/2d.) = four (shillings) and five pence halfpenny

(2)U.S. currency
?1.20 dollar (and) twenty (cents) 美金一元二角?4.25 = four dollars twenty-five cents 美金四元二角五分

(3)Soviet currency

6 Rb. 15 = six roubles fifteen kopecks

(4) German currency

1 m. 60 = one mark sixty pfennig -

(5)French currency

1 fr.30 = one franc. thirty (centimes) -

0 fr.15 = fifteen centimes

(6) Chinese People's Currency

JMP 10.35 = JMP ten yuan thirty-five (fen)

8. Weight and Measures

(1)length,area, and volume

3 in = three inches

15 ft.5 in = fifteen foot five (inches)

[

18'6 5/1"= eighteen foot six and a fifth (inches)
10×8feet= ten by eight feet

5"×4×31/2 = five inches by four by three and a half

[

(2)Weight

12 dr. 23 gr.= Twelve drams twenty-three grains

10 oz. 4 dr. = Ten ounces four drams

(3)Capacity

3 gi. = three gills

1 qt. 1 pt = one quart one pint

[

20 gal. 5 qt. =Twenty gallons five quarts

5 bu. 3 pk. = Five bushels three pecks

1/2 = a (or one) half
1/3 = a (or one) third
1/4 = a quarter or one fouth
1/5 = a (or one) fifth
2/3 = two thirds
9/10 = nine tenths
53/4 = five and three quarters
15/64= fifteen over (or by) sixty-four
15% = fifteen per cent
4‰ = four per mill

R’ R prime
R” R double prime, R second prime
R1 R sub one
100° C one hundred degrees Centigrade
+ plus; positive
- minus; negative
´ multiplied by; times
¸ divided by
± plus or minus
= is equal to; equals
º is identically equal to
» is approximately equal to
( ) round brackets; parentheses
[ ] square brackets
{ } braces
a
＞＞b a is much greater than b
a³ b a is greater than or equal to b
aµ b a varies directly as b
lognX logX to the base n
the cubic root of x
the nth root of x
x2 x square, x squared, the square of x
Xn X to n factors; the nth power of x; x to the power n
x -8 x to the minus eighth power
ï xï the absolute value of x
the mean value of X
the sum of the terms indicated; summation of
D x or d x the increment of x
dx differential x
dy/dx the first derivative of y with respect to x
ò integral
¥ infinity
1/2 a half; one half
2/3 two thirds
5/123 five over a hundred and twenty-three
eight and three over fourths; eight and three quarters
0.01 O point O one; zero point zero one; nought point nought one
6 % 6 percent
3‰ 3 per mille
2 : 3 the ratio of two to three
r=xd r equals x multiplied by d
5´ 2=10 five times two equals ten
x3/8=y2 x raised to the third power divided by eight equals y squared
(a+b-c´ d)/e=f a plus b minus c multiplied by d, all divided by e equals f
y = (Wt-W)/x y equals W sub t minus W over x

≈ is approximately equal to

≤ is less than or equal to

≥ is more th

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