\begin{table}%t4
\caption{\label{PDR model parameters}Clumpy PDR model parameters.}
\small%\centerline
 {
\begin{tabular}{cllllll}
\hline
\hline
%&&&&&& \\[-8pt]
Size	&	$n_{\rm c}$(H)	&$n_{\rm ic}$(H)		&	$F^a$	 	&	$l_{\rm c}^b$ &	 $T_{\rm gas}$ & $T_{\rm dust}$      \\
~[pc] &[\cmcub]	&	[\cmcub]	& [\%]	 	 & [pc]	 	 &[K] &[K]  \\
\hline
%&&&&&& \\[-8pt]
0.5 & 2~\x~10$^6$	&	1~\x~10$^4$	&	8	 	&	0.03	 &9--40$^c$&18--32$^c$\\ 
&&&&  &35--195$^d$&\\
\hline
\end{tabular}}
\medskip
$^{{a}}$ Volume filling fraction of clumps; 
$^{{b}}$~clump size; 
$^{{c}}$~temperatures in clumps; 
$^{{d}}$~temperatures in interclump medium.
\end{table}