标点符号的译法

+ 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 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 more 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