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常用数学符号、公式和等式的读法
&
英语缩写词
(2011-03-15 01:20:19)
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标签：
数学
公式
符号
分类：
学习
等式
缩写
读法
杂谈
一、常用数学符号、公式和等式的读法
+
加号
,
加
plus
+
正号
positive
-
减号
,
减
minus
-
负号
,
负
negetive
±
加或减
plus or minus
±
正或负
plus or minus
·
乘
multiplied by times into
÷
除
divided by
:
比
proportional to
=
等号
equal sign
=
等于
to equal,to equals
>
大于
greater than
<
小于
less than
≥
大于等于
greater than or equal
≤
小于等于
less than or equal
≡
恒等于
identical with
≈
约等于
approximately equal
≌
全等于
congruent
～
等价于
equivalent to;
相似于
similar to
→
趋近于
approaches
( )
括号
,
括弧
1)
parentheses;parenthesis;sign
圆括号
,
圆括弧
2) round brackets
[ ]
方括号
1) squre [angular]
brackets
括号
2)
brackets
{ }
花括号
braces
parenthesis
∑
求和
summstion of;sigma
从
1
到
n
的和
the
sum form i equalsone to n;sigma
从
1
到
n
的积
the
product form i
equalsone to n
x1
+x2+x3+
Λ
Λ
x one x
two plus x three,etc(et cetera)
a=b 1) a equals to b
2) a is equal
to b
3) a is b
a≠b a is not
equal to b;a is not b
a>b a is greater than b
a
<
td>
a≥b a is greater than or equal to
b
a≤b
a is less than or equal
to b
a≈b a
approximately equal (s) b
a∝b a varies directly as
b;a is (directly) proportional to b
a∈A a is member
of set A
A
?
B
A is contained in B;A is a
proper subset
of B
AIB A
intersection B
AYB A union
{ }
或
φ
empty set
?
implies
?
is equivalent to
xRy x is in the relation R to y
a±b a plus or
minus b
(a+b)(a-b) a plus b,a minus b
(a+b)2 a plus b
all squared
(a÷b)2 a over b all squared
n! n
factorial;factorial n
a% a persent
|a| mod a;modulus a
x→∞ x approaches
infinity
0< x <>
0≤x≤a zero is less than or
equal to x is less than or
equal to
a
c=a.b 1)c equals (is equal to) a
multiplied by b
2)
c equals a times b
1:2 the ratio of one to two
1/2 a half;one half
1/3 a third;one
third
1/100
a[one] hundredth
1/1000 a[one] thousandth
0.1(.1) zero point
one;nought point one
0.01(.01) zero point zero one;nought
point nought one
3.1416 three point one four one six
14. one four
point one four,one four recurring
a:b the ratio of a to b
a:b=c 1) a
devided by b equals c
2) a devided by b is c
3)the ratio of a to b is c
a:b=c:d 1) the ratio of a
to b equals the ratio of c to d
2)
a is to b as c is to d
a+b>c a plus b is greater then c
a+b<>
a+b=c a plus b
is (are;equals;is equal to) c
a-b=c a minus b(b from a)
is(equals;is equal to;leaves) c
(a,b) a< td the open in
terval from to>
[a,b]a≤x≤b the closed interval from a
to b
(a,b) the interval a< td>
[a,b] the interval
a≤x
a< td x then>
a≤x≤b a is less then or equal to x is
less then or equal to b
logax logarithm (base) of x
lnx natural
logarithm of x
x
2
1)x square;x
squured
2) x to
the second power
3) x raised to the second power
4) the square
of x
5) the
second power of x
6) x to the second
x
3
1)x cube;x cubed
2) x to the third power
3) x raised to the third
power
4) the
cube of x
5)
the third power of x
6) x to the third
x
n
1)x to the n-th power
2) x raised to the n-th power
3) the n-th
power of x
4) x
to the n-th
x
1) x to the minus n-th
-n
2)
x to the minus n-th power
radical
=b 1) the square root of a is(equals) b
2) the square
root out of a is(equals) b
the square root of a
the cube root of a
the cube root
the n-th root
a′ a
prime
a
n
1) a second
prime
2) a
double prime
3)
a twice dashed;
a
m
1) a triple
prime
2) a
third prime
a
1
1) a sub one
2) a first
a
2
1) a sub two
2) a second
a
m
1) a sub m
2) a m-th
a'
m
1) a
prime,sub m
2)
a sub m,prime
a'
1
a first prime
a
n
2
a
second, second prime
y first derivative of y
second derivative of y
dy/dx first
derivative of y with respect to x
d2y/dx2 second derivative
of y with respect to x
y=f(x) y is a function of x
∫ integral of
1)
integral of……from a to b
2) integral of……between
limits a and b
capital L equals the square root of
(out of ) capital R square
plus minus x square
a to the m by n-th power
equals the n-th root of (out of) a to
the m-th power
P=∞ p is equal to
infinity
∠ angle
⊥ perpendicular;is
perpendicular to
∥ parallel;is parallel
to
△ABC triangje ABC
vector F
a bar
≌ is congruent
to
～
is similar t
A-1 inverse of matrix
A
% percent
二、英语缩写词
abs
absolute
绝对的
absolutely
A.D
Anno Domini
ad inf
ad infinitum
ads
address
agg
aggregate
al
algebra
alt
altitude
alternate
a.m
above-mentioned
a.m.
arithmetic mean
amt
amount
ans
answer
AoI
and-or-inverter
A.P
arithmetic
progression
appl
application
appr
approximate
appx
appendix
arg
argument
arith
arithmetic
绝对地
公元
趋于无限
地址
总数、共计
代数
高度
交错
,
交替
上述的
算术平均
数量
答案、解答、回答
与或非
等差数列
应用
近似、约计
附录
自变数
,
幅角
算术
aut
aux,auxil
av,avg
Ax
B.C
BCD
BC.O
℃(c)
C
ca
CAD
automatic
auxiliary
average
Axiom
Before Christ
自动的
辅助的
平均
公理
公元前
Binary Coded Decimal
二进制编码的十进制
Binary
Coded Octal
二进制编码的八进制
centigrate
cubic
cycle
centi
circa
Computer-Aided
Design
摄氏度
立方的
周
厘
,
百分之一
大约
计算机辅助设计
CAI
Computer-Aided
Instruction
计算机辅助教学
calcd
cat
C.C.W
c.d
cf.
calculated
catalog (ue)
Counter-
Clockwise
centre distance
confer
计算的
目录
,
一览表
逆时针方向
中心距离
参看、见、比较