各种标点符号的说法 2
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%: percent 百分之…… “10%”读作：ten percent ‰ : per mill ; per thousand 千分之…… “10‰”读作：ten per thousand ∞: infinity 无限大号 “－∞” 读作：negative infinity ∝: varies as 与...成比例 “X∝Y”读作：X varies as Y √￣: square root 平方根 “√￣16=4”读作：The square root of sixteen is four. 3√￣: cube root 立方根 “3√￣27=3”读作：The cube root of 27 is 3. ∵: since; because 因为 “∵1+1=2”读作：because one plus one equals two ∴: hence; therefore 所以 “∴1<2”读作：hence one is less than two ∠: angle 角 “∠A”读作：angle A “∠A +∠B+∠C=180°” 读作：The measure of angle A plus angle B plus angle C equals 180 degrees. ⌒: semicircle 半圆 “⌒AB”读作：semicircle AB ⊙: circle 圆 “⊙A”读作：circle A ○: circumference 圆周 “○=π×d”读作：Pi multiplied by d equals circumference. π: pi constant 圆周率 “π×d”读作：pi multiplied by d △: triangle 三角形 “△ABC”读作：triangle ABC What is the area of triangle ABC? 求三角形ABC的面积。 ⊥: perpendicular to 垂直于 “A⊥B”读作：A is perpendicular to B. //: parallel to 平行于 Line AB is parallel to line CD. ∪: union of 并，合集 “A∪B”读作：the union of A and B ∩: intersection of 交，通集 “A∩B”读作：The intersection of A and B ∫: the integral of ……的积分 “∫x”读作：the integral of x ∑: summation of 总和 “∑x”读作：the summation of x equation 方程式、等式 “y = kx” 读作： Y varies as x. K is "the constant of variation. y与x成正比（y是x的正比函数），k是常数。 “y = k/x”读作： Y varies inversely as x. y与x成反比例（y是x的反比例函数）。 |
