英文正常，
看了下enscipit的help，没看见关于gbk编码的选项
-X name, --encoding=name
Use the input encoding name. Currently enscript supports the following encodings:
88591, latin1
ISO-8859-1 (ISO Latin1) (enscript's default encoding).
88592, latin2
ISO-8859-2 (ISO Latin2)
88593, latin3
ISO-8859-3 (ISO Latin3)
88594, latin4
ISO-8859-4 (ISO Latin4)
88595, cyrillic
ISO-8859-5 (ISO Cyrillic)
88597, greek
ISO-8859-7 (ISO Greek)
88599, latin5
ISO-8859-9 (ISO Latin5)
885910, latin6
ISO-8859-10 (ISO Latin6)
ascii 7-bit ascii
asciifise, asciifi, asciise
7-bit ascii with some scandinavian (Finland, Sweden) extensions
asciidkno, asciidk, asciino
7-bit ascii with some scandinavian (Denmark, Norway) extensions
ibmpc, pc, dos
IBM PC charset
mac Mac charset
vms VMS multinational charset
hp8 HP Roman-8 charset
koi8 Adobe Standard Cyrillic Font KOI8 charset
ps, PS PostScript font's default encoding
pslatin1, ISOLatin1Encoding
PostScript interpreter's `ISOLatin1Encoding'
file -i txt文件，编码是charset=iso-8859-1 ，已经是(enscript's default encoding).
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