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来自「这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易」· 代码 · 共 14 行

mnihongo is a fairly clumsy troff post-processor that 
catches unicode characters that might be japanese,
looks them up in a font file (currently
/lib/font/bit/pelm/unicode.9x24.font) to get the
bits, converts that to postscript, and dumps that
in the output.

Widths are taken from troff font Jp, which has at
best a simple approximation to the truth.

The program itself is normally called implicitly
by loading the troff macro package -mnihongo, which
does a .pi command.