符号的英文读法

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