%------------------------------------------------------------------------------------------------------------
%%%  基于树的解码方法 - chart-based decoding
\begin{center}
\begin{tikzpicture}
\begin{scope}%[scale=0.2]

\node[anchor=north] (q1) at (0,0) {\scriptsize\sffamily\bfseries{输入字符串：}};
\node[anchor=west] (q2) at ([xshift=0em,yshift=-2em]q1.west) {\footnotesize{进口$\quad$和$\quad$出口$\quad$大幅度$\quad$下降$\quad$了}};

%\node[anchor=north,fill=blue!20,minimum height=1em,minimum width=1em] (f1) at ([xshift=-4.1em,yshift=-0.8em]q2.south) {};

\node[anchor=north,fill=blue!20,minimum height=4em,minimum width=1em] (f1) at ([xshift=2.2em,yshift=-0.7em]q2.south) {};

\node[anchor=east] (n1) at ([xshift=1em,yshift=-2em]q2.west) {\scriptsize\sffamily\bfseries{匹配规则：}};

\node[anchor=west] (n2) at ([xshift=0em,yshift=0em]n1.east) {\scriptsize{$\textrm{X} \to  \langle\ \textrm{X}_1\ \text{大幅度}\ \text{下降}\ \text{了},\ \textrm{X}_1\ \textrm{have}\ \textrm{drastically}\ \textrm{fallen}\ \rangle$}};

\node[anchor=west] (n3) at ([xshift=0em,yshift=-1.5em]n2.west) {\scriptsize{$\textrm{X} \to  \langle\ \textrm{X}_1\ \text{大幅度}\ \text{下降}\ \text{了},\ \textrm{X}_1\ \textrm{have}\ \textrm{fallen}\ \textrm{drastically}\ \rangle$}};

\node[anchor=west] (n4) at ([xshift=0em,yshift=-1.5em]n3.west) {\scriptsize{$\textrm{X} \to  \langle\ \textrm{X}_1\ \text{大幅度}\ \text{下降}\ \text{了},\ \textrm{X}_1\ \textrm{has}\ \textrm{drastically}\ \textrm{fallen}\ \rangle$}};

\draw[decorate,decoration={mirror,brace}]([xshift=0.5em,yshift=-1em]q2.west) --([xshift=7em,yshift=-1em]q2.west) node [xshift=0em,yshift=-1em,align=center](label1) {};	

{\scriptsize
\node[anchor=west] (h1) at ([xshift=1em,yshift=-12em]q2.west) {{Span[0,3]下的翻译假设：}};
\node[anchor=west] (h2) at ([xshift=0em,yshift=-1.3em]h1.west) {{X: imports and exports}};
\node[anchor=west] (h6) at ([xshift=0em,yshift=-1.3em]h2.west) {{S: the import and export}};
}

{\scriptsize
\node[anchor=west] (h21) at ([xshift=9em,yshift=2em]h1.east) {{替换$\textrm{X}_1$后生成的翻译假设：}};
\node[anchor=west] (h22) at ([xshift=0em,yshift=-1.3em]h21.west) {{X: imports and exports have drastically fallen}};
\node[anchor=west] (h23) at ([xshift=0em,yshift=-1.3em]h22.west) {{X: the import and export have drastically fallen}};
\node[anchor=west] (h24) at ([xshift=0em,yshift=-1.3em]h23.west) {{X: imports and exports have drastically fallen}};
\node[anchor=west] (h25) at ([xshift=0em,yshift=-1.3em]h24.west) {{X: the import and export have drastically fallen}};
\node[anchor=west] (h26) at ([xshift=0em,yshift=-1.3em]h25.west) {{X: imports and exports has drastically fallen}};
\node[anchor=west] (h27) at ([xshift=0em,yshift=-1.3em]h26.west) {{X: the import and export has drastically fallen}};
}

\node [rectangle,inner sep=0.1em,rounded corners=1pt,draw] [fit = (h1) (h5) (h6)] (gl1) {};
\node [rectangle,inner sep=0.1em,rounded corners=1pt,draw] [fit = (h21) (h25) (h27)] (gl2) {};

\draw [->,ublue,thick] ([xshift=0.6em,yshift=0.2em]n4.south) .. controls +(south:2em) and +(east:0em) ..   ([xshift=-0em,yshift=2em]gl2.west);
\draw [->,ublue,thick] ([xshift=0em,yshift=0em]gl1.east) .. controls +(north:2.2em) and +(east:0em) ..   ([xshift=-0em,yshift=2em]gl2.west);

\end{scope}
\end{tikzpicture}
\end{center}