符号的英文说法.doc

符号的英文说法+ plus加号；正号- minus减号；负号plus or minus正负号is multiplied by乘号is divided by除号is less than小于号is greater than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 (proportion)等于；成比例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 approximately equal to约等于号angle角semicircle半圆circle圆circumference圆周pi 圆周率triangle三角形perpendicular to垂直于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Celsius system摄氏度open brace; open curly左花括号close brace; close curly右花括号(open parenthesis; open paren左圆括号)close parenthesis; close paren右圆括号() brakets; parentheses括号open bracket 左方括号close bracket 右方括号 square brackets方括号.period; dot句号；点|vertical bar; vertical virgule竖线&ersand; and; reference; ref和；引用*asterisk; multiply; star; pointer星号；乘号；星；指针/slash; divide; oblique 斜线；斜杠；除号/slash-slash; comment 双斜线；注释符#pound井号backslash; sometimes escape反斜线转义符；有时表示转义符或续行符tilde波浪符.full stop句号,comma逗号:colon冒号;semicolon分号?question mark问号!exclamation mark (英式英语)；exclamation point (美式英语)apostrophe撇号；省字符-hyphen连字号- dash 破折号.dots/ellipsis省略号single quotation marks 单引号double quotation marks 双引号 parall