小编Kim*_* Ng的帖子

例如

\def\if@nch@mpty#1{\def\temp@a{#1}\ifx\temp@a\@empty}
\def\f@nch@def#1#2{\if@nch@mpty{#2}\f@nch@gbl\def#1{\leavevmode}\else
                                   \f@nch@gbl\def#1{#2\strut}\fi}

Latex中@符号是什么意思