左括号的英文

英文中各种符号标点都怎么说 2x(-4)=-8你能用英语把这个等式(equation)读出来吗?被难倒了吧!别着急!看完下面双语君给你整理的各种数学符号和标点符号的英文表达，你马上就会说了! 数学符号 Mathematical symbols 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)。 ° degree 度 ′ minute 分 ″ second 秒 ℃ Celsius degree 摄氏度 ℉ Fahrenheit degree 华氏度 @ at sign { } curly brackets 波形括号 [ ] square brackets 方括号 () parentheses ; brackets; round brackets 括号 ( open parenthesis 左括号 ) close parenthesis 右括号 . point/dot 点 | vertical bar; vertical virgule 竖线 & ampersand; and; reference; ref 和，引用 * asterisk, multiply, star, pointer 星号，乘号，星，指针 / slash; divide; oblique; stroke; solidus 斜线，斜杠，除号 // slash-slash; comment 双斜线，注释符 # number sign; pound sign; hash 井号 \ backslash 反斜线转义符 ~ tilde 波浪符 . full stop; period 句号 , comma 逗号 : colon 冒号 ; semicolon 分号 ? question mark 问号 ! exclamation mark 惊叹号 ' apostrophe 撇号、所有格符号 - hyphen 连字号 - dash 破折号 _ underscore; understrike 下划线 ... ellipsis 省略号 ‘’ single quotation marks 单引号 “” double quotation marks 双引号 ” Ditto Sign 如上所述 ‖ parallel 双线号 〜 swung dash 代字号 § section sign; division 分节号 → arrow 箭号;参见号 ;

℃ Celsius system摄氏度{ open brace, opencurly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| vertical bar, vertical virgule竖线& ampersand, and, reference, ref和，引用* asterisk, multiply, star, pointer星号，乘号，星，指针/ slash, divide, oblique 斜线，斜杠，除号// slash-slash, comment 双斜线，注释符# pound井号\ backslash, sometimes escape反斜线转义符，有时表示转义符或续行符~ tilde波浪符. full stop句号, comma逗号: colon冒号; semicolon分号? question mark问号! exclamation mark (英式英语) exclamation point (美式英语)' apostrophe撇号- hyphen连字号-- dash 破折号... dots/ ellipsis省略号" single quotation marks 单引号"" double quotation marks 双引号‖ parallel 双线号& ampersand = and～swung dash 代字号§ section; division 分节号→arrow 箭号;参见号

标点符号 punctuation符号 notation化学符号 symbol