段落英文符号简标 + 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 等同于或相当于号 ≈ 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 大于或等于号 ≥ 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 旋转轴 ∪ union of 并，合集 ∩ intersection of 缴，通集 ∫ the integral of …的积分 ∑ (sigma) summation of 总和 ° degree 度 ′ minute 分后 ″ 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/6c6ee040874769eae009581b6bd97f192379bf5b.html