键盘字符英文
`backquote
~tilde
!exclam
@at
#numbersign
$dollar
%percent
^caret
&ampersand
*asterisk
(parenleft
)parenright
-minus
_underscore
=equal
+plus
[bracketleft
{braceleft
]bracketright
}braceright
;semicolon
:colon
'quote
"doublequote
\backslash
|bar
,comma
<less
.period
>greater
/slash
?question

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