《各种符号、数字英语读法》由会员分享，可在线阅读，更多相关《各种符号、数字英语读法（11页珍藏版）》请在金锄头文库上搜索。
1、word常用的数学符号英文读法 一、一般符号对应的英文单词 period 句号， ma 逗号： colon 冒号； semicolon 分号！ exclamation 惊叹号？ question mark 问号 hyphen 连字符 apostrophe 省略号；所有格符号 dash 破折号single quotation marks 单引号“double quotation marks 双引号( ) parentheses 圆括号 square brackets 方括号 French quotes 法文引号；书名号. ellipsis 省略号 tandem colon 双点号 ditto 同
2、上 parallel 平行双线号 virgule 斜线号 ampersand = and swung dash 代字号 section; division 分节号 arrow 箭号；参见号 plus 加号；正号 minus 减号；负号 plus or minus 正负号 is multiplied by or cross 叉乘 is divided by 除号 is equal to 等于号 is not equal to 不等于号 is equivalent to 全等于号 is equal to or approximately equal to 等于或约等于号 is approximat
3、ely equal to 约等于号 is less than 小于号 is more than is greater than在数学中更常用 大于号 is not less than不小于号 is not more than不大于号 is less than or equal to 小于或等于号 is more than or equal to 大于或等于号 per cent 百分之 per mill 千分之 infinity 无限大号 varies as 与成比例 (square) root 平方根 since; because 因为 hence 所以 equals, as (proport
4、ion) 等于，成比例 angle 角 semicircle 半圆 circle 圆 circumference 圆周 pi 圆周率 triangle 三角形 perpendicular to 垂直于；另外normal to，right to也都有垂直的意思。 union of 并，合集 intersection of 交，通集 the integral of 的积分 (sigma) summation of 总和 degree 度 minute 分 second 秒number号 Celsiussystem摄氏度 at单价 pi. dot (点乘就是centered dot)：偏微分符号,读
5、作round 法国人发明的.偏导数英文翻译为partial derivative,因此有时读为partial.还有一种读法,念成round：是希腊字母的古典写法,数学里只用作表示偏导数的记号,在表示偏导数的时候,一般不念字母名称,中国人大多念作“偏,(例如 z对x的偏导数,念作“偏z偏x.)(简单的把y/x读成偏y比偏x)倒三角符号读“Nabla,奈不拉,也可以读作“Del，读nabla的居多，Del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如此作用于函数时会分别得到f f prime f撇A上面一个横杠：A barA上面一个星星*： A asteriskA上面
6、一个波浪线：A tildeA的厄米共轭注意不是加号，那个竖比横长：A daggerdagger：短剑，匕首梯度：grandient 符号为grad，散度：divergence 符号为div。此时可直接读作grandientdivergence of .逻辑there existfor allpq p implies q / if p, then qpq p if and only if q /p is equivalent to q / p and q are equivalentxA x belongs to A / x is an element (or a member) of AxA
7、x does not belong to A / x is not an element (or a member) of AAB A is contained in B / A is a subset of BAB A contains B / B is a subset of AAB A cap B / A meet B / A intersection BAB A cup B / A join B / A union BAB A minus B / the diference between A and BAB A cross B / the cartesian product of A
8、 and B3. Real numbersx+1x plus onex-1x minus onex1 x plus or minus onexyxy / x multiplied by y(x - y)(x + y)x minus y, x plus yx y x over y=the equals signx = 5x equals 5 / x is equal to 5x5 x (is) not equal to 5xy x is equivalent to (or identical with) yx y x is not equivalent to (or identical with
9、) yx yx is greater than yxy x is greater than or equal to yx yx is less than yxy x is less than or equal to y0 x 1zero is less than x is less than 10x1 zero is less than or equal to x is less than or equal to 1| x | mod x / modulus xx 2 x squared / x (raised) to the power 2x 3 x cubedx 4 x to the fo
10、urth / x to the power fourx n x to the nth / x to the power nx n x to the (power) minus nx (square) root x / the square root of xx 3 cube root (of) xx 4 fourth root (of) xx n nth root (of) x( x+y ) 2 x plus y all squared( x y ) 2 x over y all squaredn!n factorialx x hatx x barx x tildex i xi / x sub
11、script i / x suffix i / x sub i i=1 n a i the sum from i equals one to n a i / the sum as i runs from 1 to n of the a i 4. Linear algebra x the norm (or modulus) of xOA OA / vector OAOA OA / the length of the segment OAA T A transpose / the transpose of AA 1 A inverse / the inverse of A5. Functionsf
12、( x ) fx / f of x / the function f of xf:ST a function f from S to Txy x maps to y / x is sent (or mapped) to yf( x ) f prime x / f dash x / the (first) derivative of f with respect to xf( x ) f double-prime x / f double-dash x / the second derivative of f with respect to xf( x ) triple-prime x / f
13、triple-dash x / the third derivative of f with respect to xf (4) ( x ) f four x / the fourth derivative of f with respect to xf x 1 the partial (derivative) of f with respect to x12 f x 1 2 the second partial (derivative) of f with respect to x1 0 the integral from zero to infinitylim x0 the limit a
14、s x approaches zerolim x 0 + the limit as x approaches zero from abovelim x 0 the limit as x approaches zero from belowlog e y log y to the base e / log to the base e of y / natural log (of) yLny log y to the base e / log to the base e of y / natural log (of) y二、一些函数关系的读法A与B的乘积 the _ product of A and B_中填乘积的性质，
