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托福词汇:英文标点符号篇

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Lisa

2016年03月17日

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托福词汇:英文标点符号篇
  01

  +: plus 加号;正号

  “1+1”读作:one plus one

  02

  -: minus; negative 减号;负号

  “2-1”读作:two minus one

  “-3”读作:minus three或negative three

  “2-(-3)”读作:two minus negative three

  03

  ±: plus-minus sign 正负号

  “±1” 读作:plus or minus one

  04

  ×: multiplied by ; times 乘号

  “2×3” 读作:two multiplied by three 或 two times three

  05

  ÷: divided by 除号

  “4÷2”读作:four divided by two

  06

  =: equals; is equal to 等于号

  “1+1=2”读作:One plus one equals two.

  或 One plus one is equal to two.

  07

  ≠: is not equal to 不等于号

  “a≠b”读作:a is not equal to b

  08

  ≌: congruent to 全等(两个图形形状相同、大小相等)

  “△ABC≌△DEF”读作:Triangle ABC is congruent to Triangle DEF.

  09

  ≈: approximately equal to 约等于号

  “3×3≈10” 读作:Three multiplied by three is approximately equal to ten.

  10

  <: is less than 小于号

  “1<2”读作 One is less than two.

  11

  >: is greater than 大于号

  “2>1”读作:Two is greater than one.

  12

  ≮: is not less than 不小于号

  “3≮2”读作:Three is not less than two.

  13

  ≯: is not greater than 不大于号

  “2≯4” 读作:Two is not greater than four.

  14

  ≤: is less than or equal to 小于或等于号

  “2≤3”读作:Two is less than or equal to three.

  15

  ≥: is greater than or equal to 大于或等于号

  “5≥4”读作:Five is greater than or equal to four.

  16

  %: percent 百分之……

  “10%”读作:ten percent

  17

  ‰ : per mill ; per thousand 千分之……

  “10‰”读作:ten per thousand

  18

  ∞: infinity 无限大号

  “-∞” 读作:negative infinity

  19

  ∝: varies as 与...成比例

  “X∝Y”读作:X varies as Y

  20

  √ ̄: square root 平方根

  “√ ̄16=4”读作:The square root of sixteen is four.

  21

  3√ ̄: cube root 立方根

  “3√ ̄27=3”读作:The cube root of 27 is 3.

  22

  ∵: since; because 因为

  “∵1+1=2”读作:because one plus one equals two

  23

  ∴: hence; therefore 所以

  “∴1<2”读作:hence one is less than two

  24

  ∠: 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.

  25

  ⌒: semicircle 半圆

  “⌒AB”读作:semicircle AB

  26

  ⊙: circle 圆

  “⊙A”读作:circle A

  27

  ○: circumference 圆周

  “○=π×d”读作:Pi multiplied by d equals circumference.

  28

  π: pi constant 圆周率

  “π×d”读作:pi multiplied by d

  29

  △: triangle 三角形

  “△ABC”读作:triangle ABC

  What is the area of triangle ABC? 求三角形ABC的面积。

  30

  ⊥: perpendicular to 垂直于

  “A⊥B”读作:A is perpendicular to B.

  31

  //: parallel to 平行于

  Line AB is parallel to line CD.

  32

  ∪: union of 并,合集

  “A∪B”读作:the union of A and B

  33

  ∩: intersection of 交,通集

  “A∩B”读作:The intersection of A and B

  34

  ∫: the integral of ……的积分

  “∫x”读作:the integral of x

  35

  ∑: summation of 总和

  “∑x”读作:the summation of x

  36

  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)。


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