当要显示特殊符号，但是组合在一起又不行的时候，可以用十进制字符处理
字符 十进制字符编号 实体名字
! ! 惊叹号Exclamation mark
” " " 双引号Quotation mark
# # 数字标志Number sign
$ $ 美元标志Dollar sign
% % 百分号Percent sign
& & & Ampersand
‘ ' 单引号Apostrophe
( ( 小括号左边部分Left parenthesis
) ) 小括号右边部分Right parenthesis
* * 星号Asterisk
+ + 加号Plus sign
, , 逗号Comma
– - 连字号Hyphen
. . 句号Period (fullstop)
/ / 斜杠Solidus (slash)
0 0 数字0 Digit 0
1 1 数字1 Digit 1
2 2 数字2 Digit 2
3 3 数字3 Digit 3
4 4 数字4 Digit 4
5 5 数字5 Digit 5
6 6 数字6 Digit 6
7 7 数字7 Digit 7
8 8 数字8 Digit 8
9 9 数字9 Digit 9
: : 冒号Colon
; ; 分号Semicolon
< < < 小于号Less than
= = 等于符号Equals sign
> > > 大于号Greater than
? ? 问号Question mark
@ @ Commercial at
A A 大写A Capital A
B B 大写B Capital B
C C 大写C Capital C
D D 大写D Capital D
E E 大写E Capital E
F F 大写F Capital F
G G 大写G Capital G
H H 大写H Capital H
I I 大写J Capital I
J J 大写K Capital J
K K 大写L Capital K
L L 大写K Capital L
M M 大写M Capital M
N N 大写N Capital N
O O 大写O Capital O
P P 大写P Capital P
Q Q 大写Q Capital Q
R R 大写R Capital R
S S 大写S Capital S
T T 大写T Capital T
U U 大写U Capital U
V V 大写V Capital V
W W 大写W Capital W
X X 大写X Capital X
Y Y 大写Y Capital Y
Z Z 大写Z Capital Z
[ [ 中括号左边部分Left square bracket
\ \ 反斜杠Reverse solidus (backslash)
] ] 中括号右边部分Right square bracket
^ ^ Caret
_ _ 下划线Horizontal bar (underscore)
` ` 尖重音符Acute accent
a a 小写a Small a
b b 小写b Small b
c c 小写c Small c
d d 小写d Small d
e e 小写e Small e
f f 小写f Small f
g g 小写g Small g
h h 小写h Small h
i i 小写i Small i
j j 小写j Small j
k k 小写k Small k
l l 小写l Small l
m m 小写m Small m
n n 小写n Small n
o o 小写o Small o
p p 小写p Small p
q q 小写q Small q
r r 小写r Small r
s s 小写s Small s
t t 小写t Small t
u u 小写u Small u
v v 小写v Small v
w w 小写w Small w
x x 小写x Small x
y y 小写y Small y
z z 小写z Small z
{ { 大括号左边部分Left curly brace
| | 竖线Vertical bar
} } 大括号右边部分Right curly brace
~ ~ Tilde
— 未使用Unused
空格Nonbreaking space
¡ ¡ ¡ Inverted exclamation
¢ ¢ ¢ 货币分标志Cent sign
£ £ £ 英镑标志Pound sterling
¤ ¤ ¤ 通用货币标志General currency sign
¥ ¥ ¥ 日元标
¦ ¦ ¦ or &brkbar;“`
§ § § 分节号Section sign
¨ ¨ ¨ or ¨“`
© © © 版权标志Copyright
ª ª ª Feminine ordinal
« « « Left angle quote, guillemet left
“““ Soft hyphen
® ® ® 注册商标标志Registered trademark
¯ ¯ ¯ or &hibar;“`
° ° ° 度数标志Degree sign
± ± ± 加或减Plus or minus
² ² ² 上标2 Superscript two
³ ³ ³ 上标3 Superscript three
´ ´ ´ 尖重音符Acute accent
µ µ µ Micro sign
¶ ¶ ¶ Paragraph sign
· · · Middle dot
¸ ¸ ¸ Cedilla
¹ ¹ ¹ 上标1 Superscript one
º º º Masculine ordinal
» » » Right angle quote, guillemet right
¼ ¼ ¼ 四分之一Fraction one-fourth
½ ½ ½ 二分之一Fraction one-half
¾ ¾ ¾ 四分之三Fraction three-fourths
¿ ¿ ¿ Inverted question mark
À À À Capital A, grave accent
Á Á Á Capital A, acute accent
   Capital A, circumflex
à à à Capital A, tilde
Ä Ä Ä Capital A, di?esis / umlaut
Å Å Å Capital A, ring
Æ Æ Æ Capital AE ligature
Ç Ç Ç Capital C, cedilla
È È È Capital E, grave accent
É É É Capital E, acute accent
Ê Ê Ê Capital E, circumflex
Ë Ë Ë Capital E, di?esis / umlaut
Ì Ì Ì Capital I, grave accent
Í Í Í Capital I, acute accent
Î Î Î Capital I, circumflex
Ï Ï Ï Capital I, di?esis / umlaut
Ð Ð Ð Capital Eth, Icelandic
Ñ Ñ Ñ Capital N, tilde
Ò Ò Ò Capital O, grave accent
Ó Ó Ó Capital O, acute accent
Ô Ô Ô Capital O, circumflex
Õ Õ Õ Capital O, tilde
Ö Ö Ö Capital O, di?esis / umlaut
× × × 乘号Multiply sign
Ø Ø Ø Capital O, slash
Ù Ù Ù Capital U, grave accent
Ú Ú Ú Capital U, acute accent
Û Û Û Capital U, circumflex
Ü Ü Ü Capital U, di?esis / umlaut
Ý Ý Ý Capital Y, acute accent
Þ Þ Þ Capital Thorn, Icelandic
ß ß ß Small sharp s, German sz
à à à Small a, grave accent
á á á Small a, acute accent
â â â Small a, circumflex
ã ã ã Small a, tilde
ä ä ä Small a, di?esis / umlaut
å å å Small a, ring
æ æ æ Small ae ligature
ç ç ç Small c, cedilla
è è è Small e, grave accent
é é é Small e, acute accent
ê ê ê Small e, circumflex
ë ë ë Small e, di?esis / umlaut
ì ì ì Small i, grave accent
í í í Small i, acute accent
î î î Small i, circumflex
ï ï ï Small i, di?esis / umlaut
ð ð ð Small eth, Icelandic
ñ ñ ñ Small n, tilde
ò ò ò Small o, grave accent
ó ó ó Small o, acute accent
ô ô ô Small o, circumflex
õ õ õ Small o, tilde
ö ö ö Small o, di?esis / umlaut
÷ ÷ ÷ 除号Division sign
ø ø ø Small o, slash
ù ù ù Small u, grave accent
ú ú ú Small u, acute accent
û û û Small u, circumflex
ü ü ü Small u, di?esis / umlaut
ý ý ý Small y, acute accent
þ þ þ Small thorn, Icelandic
ÿ ÿ ÿ Small y, umlaut