1、第三篇数、符号、公式、图形的英文表达（简介）,第二十章数的表达 数的系统：自然数（Natural Numbers）、整数（Integers）、有理数（Rational Numbers）、无理数（Irrational Numbers）、实数（Real Numbers）、虚数（Pure Imaginary Numbers）、复数（Complex Numbers） 一、整数 35,896,732,546,285 读作：thirty-five trillion eight hundred and ninety-six billion seven hundred and thirty-two milli
2、on five hundred and forty-six thousand two hundred and eighty-five,10亿以上的数，英式英语和美式英语表达不同。 billion：1109（美式）； 11012（英式） trillion：11012（美式）； 11018（英式） quadrillion：11015（美式）； 11024（英式） quintillion： 11018 （美式）； 11030 （英式） sextillion：11021（美式）； 11036（英式） septillion：11024 （美式）； 11042 （英式） octillion：11027 （
3、美式）； 11048 （英式） nonillion：11030（美式）； 11054 英式） decillion： 11033（美式）； 11060 英式） 注意在上述这样的数词中，hundred，thousand，million，billion，trillion等词一般是单数形式。 例如：two hundred，three million，five trillion，etc., 第403号房间Room 403 读作：room four oh one 电话号码：0371-7426329Telephone Number: 0371-7426329 读作：zero three seven one
4、seven four two six three two nine 97次列车Train Number 97 读作：train ninety-seven或the ninety-seventh train 美国西北航空公司3644航班Flight NW 3644 读作：flight NW three six four four 公元前753年（in）the 753 BC 读作：（in）the year seven hundred and fifty-three BC 20世纪70年代1970s或1970s 读作：（in）nineteen seventies 1945年8月in August, 1
5、945 读作：in August nineteen forty-five, 1997年7月1日on July 1(st), 1997或on 1(st ) July, 1997 读作：on July the first ninety-seven或on the first of July nineteen ninety-seven 上午九点十分09:10 a.m. 读作：（oh）nine ten a.m. 二、小数和分数 329,671,239.953579 读作：three hundred and twenty-nine million six hundred and seventy-one t
6、housand two hundred and thirty-nine point nine five three five seven nine 2,050.0357 读作：two thousand and fifty point zero three five seven .01 读作：one hundredth（point zero one）, 读作： zero point seven repetent seven, 读作：zero point three seven repetend three, seven, 读作： zero point three seven recurring,
7、 .00001 读作：one millionth（point zero zero zero zero one/point four zero one） 9.621 读作：nine point six two one, 读作：zero point three fives equals zero point five recurring, 读作： zero point two four, seven three recurring/zero point two four, seven three repetend seven three, 读作：Zero point four zeros one
8、equals one over one hundred thousand equals one over ten to the fifth power equals ten to the minus fifth power 0.0000053= 5.30.000001= 5.310 6 读作：Minus zero point five zeros five three equals minus five point three times zero point five zeros one equals minus five point three times ten to the minus
9、 sixth power, 读作：five and five-eighths（five and five over eight或five and five divided by eight）, 读作：Three divided by seven equals zero point four two eight five seven one four two eight five seven one, etc. equals zero point four two eight five seven one repetend four two eight five seven one., 读作：Z
10、ero point zero zero three percent equals zero point zero zero three over one hundred equals zero point four zeros three., 0.25= 0.25 1000 = 250 读作：Zero point two five equals zero point two five times thousand per mille equals two hundred and fifty per mille.,第二十一章符号的表达,一、一般数学符号 2 + 3 读作：two plus thr
11、ee 10 b 读作：ten minus b x= 3 读作：x equals minus or plus five x y 读作：x times y或x multiplied by y 9 4 读作：nine divided by four 1 : 2 读作：the ratio of one to two, a : b 读作：a is to b 0.3% 读作：zero point three percent 3.8 读作：three point eight per mille, 读作：Open parenthesis six plus five and three-fourths minu
12、s four point six six multiplied by three close parenthesis divided by three and one seventh, a2b2 (ab)(ab) 读作：a squared minus b squared equals the quantity a plus b times the quantity a minus b.或a squared minus b squared equals open parenthesis a plus b close parenthesis times open parenthesis a min
13、us b close parenthesis., 读作：The quantity a plus b to the nth power equals a to the nth power plus n times the quantity a to the n minus one power times b plus n times the quantity n minus one divided by two times the quantity a to the n minus two power times b squared down to plus b to the nth power
14、., 读作：k equals eighty-one times two-thirds to the eight power., 读作：x to the third power plus one overdivided by the quantity x squared times one to the two-thirds power., 读作：The limit as n approaches infinity of the quantity one over n squared times the sum of n positive integers.或The limit as n app
15、roaches infinity of the quantity one over n squared times one plus two plus up to plus n., 读作：Fifteen times x squared minus open bracket minus four times x squared plus six open parenthesis x minus x squared close parenthesis minus three times x close bracket., 读作：One-half open brace, a open bracket
16、 b plus open parenthesis c minus d close parenthesis close bracket close brace., (ab)(ab) a2b2 读作：The product of the sum and difference of two terms a and b equals the difference of their squares., 读作：c is identical with fivec is equivalent to fivec is identical to five.,读作：c plus d times a is not e
17、qual to zero., 读作：G equals m times g, and G is in direct proportion to m., 读作：t equals three divide by seven is approximately equal to zero point four two nine., 读作：Two over four is corresponding to ninety degrees., a 0 读作：Ell en x equals the logarithm to the base e of x, for x is greater than zero.
18、 f (x) = 1 + ln (x-2) 读作：The function f of x equals one plus ell en the quantity x minus two. 六、三角函数、反三角函数、双曲函数和反双曲函数 sin3 3sin 4sin3 读作：The sine of three theta is equivalent to three times the sine of theta minus four times the quantity sine theta cubed., 读作：The cosine of t equals minus the square
19、root of one minus the quantity sine t squared., 读作：The tangent of pi over four equals 1., 读作：The cotangent of t equals x over y equals the cosine of t over the sine of t., 读作：The secant of pi over four equals the square root of two., csc2 ctg2 = 1 读作：The cosecant alpha squared minus the cotangent al
20、pha squared equals one., 读作：The arcsinethe inverse sine of minus one-half equals minus the quantity pi over six., 读作：One-half y equals the arctangent of the square root of the quantity one minus x over one plus x., 读作：The arcsecant of x plus the arccosecant of x equals pi over two., 读作：The hyperboli
21、c sine of x equals the quantity e to the xth power minus e to the minus xth power over two., 读作：The hyperbolic tangent of x equals the quantity e to the xth power minus e to the minus xth power over e to the xth power plus e to the minus xth power., 读作：The arc-hyperbolic sine of x equals ell en the
22、quantity x plus or minus the square root of x squared plus one.,七、集合 K = 1, 2, 3, 4, 5 读作：K equals the set whose members（elements）are one, two, three, four, five. I1 = 0, 1, 1, 2, , n, n 读作：I sub one equals the set whose elements are zero, one, minus one, two, minus two, etc., till n, minus n. S = x
23、 | 5 x 7 读作：The set S is the set of numbers x is between five and seven., 读作：four is a member of N, 读作：minus one is not a member of N, A是B的子集，或A包含于B 读作： A is a subset of set B or A is a part of B., AA = A 读作：The set consisting of all element common to A equals A itself. AB= BA 读作：The set consisting of all elements common to A and B equals the set consisting of all elements common to B and A. 若AB= AB，则A=B 读作：If the set consisting of all elements of A or B or both equals the set consisting of all elements of B or A both, then set A equals set B.,
