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%%% 什么是短语
\begin{center}
\begin{tikzpicture}

\begin{scope}[minimum height = 18pt]
{\small

\node[anchor=north,fill=green!20,draw,thick,rounded corners=0.3em] (s1) at (0,0) {进口};
\node [anchor=west,fill=red!20,draw,thick,rounded corners=0.3em] (s2) at ([xshift=1em,yshift=0em]s1.east) {大幅度};
\node[anchor=west,fill=blue!20,draw,thick,rounded corners=0.3em] (s3) at ([xshift=1em,yshift=0em]s2.east) {下降\ \ \ 了};

\node[anchor=west,fill=green!20,draw,thick,rounded corners=0.3em] (t1) at ([xshift=0em,yshift=-4em]s1.west) {The imports have};
\node[anchor=west,fill=red!20,draw,thick,rounded corners=0.3em] (t2) at ([xshift=1em,yshift=0em]t1.east) {drastically};
\node[anchor=west,fill=blue!20,draw,thick,rounded corners=0.3em] (t3) at ([xshift=1em,yshift=0em]t2.east) {fallen};

\path[<->, thick] ([yshift=-0.1em]s1.south) edge ([yshift=0.1em]t1.north);
\path[<->, thick] ([yshift=-0.1em]s2.south) edge ([yshift=0.1em]t2.north);
\path[<->, thick] ([yshift=-0.1em]s3.south) edge ([yshift=0.1em]t3.north);
}

\node[anchor=south] (s0) at ([xshift=-3.5em,yshift=0em]s1.south) {源语言：};
\node[anchor=east] (t0) at ([xshift=0em,yshift=-3.5em]s0.east) {目标语言：};
\end{scope}

\end{tikzpicture}
\end{center}