加拿大华人论坛 加拿大百科英语学习：从基础做起之二（符号篇）

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上个帖子与大家共同学习了与数字相关的表达法，现在与大家一起学习一些数学符号表达方法，与大家共勉。有些表法法在college入学数学考试中是常用的：[FONT=宋体]．[/FONT] period [FONT=宋体]句号[/FONT] [FONT=宋体]≈[/FONT] is approximately equal to [FONT=宋体]约等于号[/FONT] [FONT=宋体]，[/FONT] comma [FONT=宋体]逗号[/FONT] [FONT=宋体]＜[/FONT] is less than [FONT=宋体]小于号[/FONT] [FONT=宋体]：[/FONT] colon [FONT=宋体]冒号[/FONT] [FONT=宋体]＞[/FONT] is more than [FONT=宋体]大于号[/FONT] [FONT=宋体]；[/FONT] semicolon [FONT=宋体]分号[/FONT] [FONT=宋体]≮[/FONT] is not less than [FONT=宋体]不小于号[/FONT] [FONT=宋体]！[/FONT] exclamation [FONT=宋体]惊叹号[/FONT] [FONT=宋体]≯[/FONT] is not more than [FONT=宋体]不大于号[/FONT] [FONT=宋体]？[/FONT] question mark [FONT=宋体]问号[/FONT] [FONT=宋体]≤[/FONT] is less than or equal to [FONT=宋体]小于或等于号[/FONT] [FONT=宋体]￣[/FONT] hyphen [FONT=宋体]连字符[/FONT] [FONT=宋体]≥[/FONT] is more than or equal to [FONT=宋体]大于或等于号[/FONT] ' apostrophe [FONT=宋体]省略号[/FONT] [FONT=宋体]；所有格符号[/FONT] [FONT=宋体]％[/FONT] per cent [FONT=宋体]百分之…[/FONT] - dash [FONT=宋体]破折号[/FONT] [FONT=宋体]‰[/FONT] per mill [FONT=宋体]千分之…[/FONT] ' ' single quotation marks [FONT=宋体]单引号[/FONT] [FONT=宋体]∞[/FONT] infinity [FONT=宋体]无限大号[/FONT] double quotation marks [FONT=宋体]双引号[/FONT] [FONT=宋体]∝[/FONT] varies as [FONT=宋体]与…成比例[/FONT] ( ) parentheses [FONT=宋体]圆括号[/FONT] [FONT=宋体]√[/FONT] (square) root [FONT=宋体]平方根[/FONT] [ ] square brackets [FONT=宋体]方括号[/FONT] [FONT=宋体]∵[/FONT] since; because [FONT=宋体]因为[/FONT] [FONT=宋体]《[/FONT] [FONT=宋体]》[/FONT] French quotes [FONT=宋体]法文引号[/FONT];[FONT=宋体]书名号[/FONT] [FONT=宋体]∴[/FONT] hence [FONT=宋体]所以[/FONT] ... ellipsis [FONT=宋体]省略号[/FONT] [FONT=宋体]∷[/FONT] equals, as (proportion) [FONT=宋体]等于，成比例[/FONT] [FONT=宋体]¨[/FONT] tandem colon [FONT=宋体]双点号[/FONT] [FONT=宋体]∠[/FONT] angle [FONT=宋体]角[/FONT] ditto [FONT=宋体]双点号[/FONT] [FONT=宋体]⌒[/FONT] semicircle [FONT=宋体]半圆[/FONT] [FONT=宋体]‖[/FONT] parallel [FONT=宋体]双线号[/FONT] [FONT=宋体]⊙[/FONT] circle [FONT=宋体]圆[/FONT] [FONT=宋体]／[/FONT] virgule [FONT=宋体]斜线号[/FONT] [FONT=宋体]○[/FONT] circumference [FONT=宋体]圆周[/FONT] [FONT=宋体]＆[/FONT] ampersand = and [FONT=宋体]π[/FONT] pi [FONT=宋体]圆周率[/FONT] [FONT=宋体]～[/FONT] swung dash [FONT=宋体]代字号[/FONT] [FONT=宋体]△[/FONT] triangle [FONT=宋体]三角形[/FONT] [FONT=宋体]§[/FONT] section; division [FONT=宋体]分节号[/FONT] [FONT=宋体]⊥[/FONT] perpendicular to [FONT=宋体]垂直于[/FONT] [FONT=宋体]→[/FONT] arrow [FONT=宋体]箭号；参见号[/FONT] [FONT=宋体]∪[/FONT] union of [FONT=宋体]并，合集[/FONT] [FONT=宋体]＋[/FONT] plus [FONT=宋体]加号；正号[/FONT] [FONT=宋体]∩[/FONT] intersection of [FONT=宋体]交，通集[/FONT] [FONT=宋体]－[/FONT] minus [FONT=宋体]减号；负号[/FONT] [FONT=宋体]∫[/FONT] the integral of [FONT=宋体]…的积分[/FONT] [FONT=宋体]±[/FONT] plus or minus [FONT=宋体]正负号[/FONT] ( [FONT=宋体]∑[/FONT] sigma) summation of [FONT=宋体]总和[/FONT] [FONT=宋体]×[/FONT] is multiplied by [FONT=宋体]乘号[/FONT] [FONT=宋体]°[/FONT] degree [FONT=宋体]度[/FONT] [FONT=宋体]÷[/FONT] is divided by [FONT=宋体]除号[/FONT] [FONT=宋体]′[/FONT] minute [FONT=宋体]分[/FONT] [FONT=宋体]＝[/FONT] is equal to [FONT=宋体]等于号[/FONT] [FONT=宋体]″[/FONT] second [FONT=宋体]秒[/FONT] [FONT=宋体]≠[/FONT] is not equal to [FONT=宋体]不等于号[/FONT] [FONT=宋体]＃[/FONT] number [FONT=宋体]…号[/FONT] [FONT=宋体]≡[/FONT] is equivalent to [FONT=宋体]全等于号[/FONT] [FONT=宋体]℃[/FONT] Celsius system [FONT=宋体]摄氏度[/FONT] [FONT=宋体]≌[/FONT] is equal to or approximately equal to [FONT=宋体]等于或约等于号[/FONT] [FONT=宋体]＠[/FONT] at [FONT=宋体]单价[/FONT] 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 [FONT=宋体]±[/FONT] plus or minus = is equal to; equals º is identically equal to » is approximately equal to ( ) round brackets; parentheses [ ] square brackets { } braces a[FONT=宋体]＞＞[/FONT]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 [FONT=宋体]ò[/FONT] 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

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