常用数学符号的英文用语
-
+
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
⊥
perpendicular
to
垂直于
∪
union of
并，合集
∩
intersection of
交，通集
∫
the integral of
…
的积分
∑
(sigma)
summation of
总和
°
degree
度
′
minute
分
″
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
() brackets/ 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
& amp;
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
～
swung dash
代字号
§
section; division
分节号
→
arrow
箭号；参见号
1. Logic
9 there exists
8 for all
p ) q p implies q
/ if p, then q
p , q p if and only if q
/p is equivalent to q / p and q are equivalent
2. Sets
x 2 A x belongs to A
/ x is an element (or a member) of A
x
=2 A x does not belong to A / x is not an element
(or a member) of A
A ?B A is contained
in B / A is a subset of B
A ?B A
contains B / B is a subset of A
A B
A cap B / A meet B / A intersection
B
A [ B
A cup B /
A join B / A union B
A n B A
minus B / the di?rence between A and B