符号的英文读法

． period 句号

≈ is approximately equal to 约等于号

， comma 逗号

＜ is less than 小于号

： colon 冒号

＞ is more than 大于号

； semicolon 分号


≮ is not less than 不小于号

！ exclamation 惊叹号

≯ is not more than 不大于号

？ question mark 问号

≤ is less than or equal to 小于或等于号

￣ hyphen 连字符

≥ is more than or equal to 大于或等于号

' apostrophe 省略号

；所有格符号

％ per cent 百分之…

- dash 破折号

‰ per mill 千分之…

' ' single quotation marks 单引号

∞ infinity 无限大号

double quotation marks 双引号


∝ varies as 与…成比例

( ) parentheses 圆括号

√ (square) root 平方根

[ ] square brackets 方括号

∵ since; because 因为

《 》 French quotes 法文引号;书名号

∴ hence 所以

.
.. ellipsis 省略号

∷ equals, as (proportion) 等于，成比例

¨ tandem colon 双点号

∠ angle 角

ditto 双点号

⌒ semicircle 半圆

‖ parallel 双线号

⊙ circle 圆


／ virgule 斜线号

○ circumference 圆周

＆ ampersand = and

π pi 圆周率

semicircle～ swung dash 代字号

△ triangle 三角形

§ section; division 分节号

⊥ perpendicular to 垂直于

→ arrow 箭号；参见号

∪ union of 并，合集

＋ plus 加号；正号

∩ intersection of 交，通集

－ minus 减号；负号

∫ the integral of …的积分   shait

± plus or minus 正负号


( ∑ sigma) summation of 总和

× is multiplied by 乘号

° degree 度

÷ is divided by 除号

′ minute 分

＝ is equal to 等于号

″ second 秒

≠ is not equal to 不等于号

＃ number …号

≡ is equivalent to 全等于号

℃ Celsius system 摄氏度

≌ is equal to or approximately equal to 等于或约等于号

＠ at 单价

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 equa
ls f

y = (Wt-W)/x y equals W sub t minus W over x

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