重定义\caption命令，现在的格式为\caption{英文}{中文}
\makeatletter
\setlength\abovecaptionskip{3\p@}
\long\def\@caption#1[#2]#3#4{%
\par
\addcontentsline{\csname ext@#1\endcsname}{#1}%
{\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
\begingroup
\@parboxrestore
\if@minipage
\@setminipage
\fi
\normalsize
\@makecaption{\csname fchnnum@#1\endcsname}{\ignorespaces #4}
\@makecaption{\csname fnum@#1\endcsname}{\ignorespaces #3} \par
\endgroup}
\renewcommand{\tablename}{Table}
\newcommand{\tablechnname}{表}
\def\fnum@table{\tablename\nobreakspace\thetable}
\def\fchnnum@table{\tablechnname\nobreakspace\thetable}
\renewcommand{\figurename}{Figure}
\newcommand{\figurechnname}{图}
\def\fnum@figure{\figurename\nobreakspace\thefigure}
\def\fchnnum@figure{\figurechnname\nobreakspace\thefigure}
\makeatother