
%%% outline
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    \begin{tikzpicture}
    \node [anchor=west] (e1) at (0,0) {$g(\seq{s},\seq{t})$};
    \node [anchor=west] (e2) at (e1.east) {$=$};
    \node [anchor=west,inner sep=2pt,fill=red!20] (e3) at (e2.east) {$\prod\nolimits_{(j,i) \in \hat{A}} \funp{P}(s_j,t_i)$};
    \node [anchor=west,inner sep=1pt] (e4) at (e3.east) {$\times$};
    \node [anchor=west,inner sep=3pt,fill=blue!20] (e5) at (e4.east) {$\funp{P}_{\textrm{lm}}(\seq{t})$};
    \node [anchor=north west,inner sep=1pt] (n1) at ([xshift=7.0em,yshift=-0.5em]e1.south west) {$\funp{P}(\seq{s}|\seq{t})$};
    \node [anchor=north] (n1part2) at ([yshift=0.3em]n1.south) {\scriptsize{{翻译模型}}};
    \node [anchor=west,inner sep=1pt] (n2) at ([xshift=4.0em]n1.east) {$\funp{P}(\seq{t})$};
    \node [anchor=north] (n2part2) at ([yshift=0.3em]n2.south) {\scriptsize{{语言模型}}};

    \end{tikzpicture}




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