+ 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 ≣ 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 π 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 本文来源:https://www.wddqw.com/doc/5fe5167df31dc281e53a580216fc700abb685239.html