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
2、 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 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 int
3、ersection 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division 分节号
