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1、+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 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i
2、s 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m
3、inute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, refer
4、ence, 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-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parallel双线号&ersand = andswung dash代字号section; division分节号
