\begin{table}%t3
\par
%\centering
\par
\caption{\label{results}Summary of the model results.}
\begin{tabular}{rccc}
\hline
\hline
\noalign{\smallskip}
&\multicolumn{1}{c}{$N_{{\rm H_2CO-}p}$}&\multicolumn{1}{c}{$N_{{\rm CH_3OH-}A}$}&\multicolumn{1}{c}{${[\rm CH_3OH}{-}A]/[{\rm H_2CO}{-}p]$}\\[0.3mm]
&\multicolumn{1}{c}{[$10^{13}$~cm$^{-2}$]}&\multicolumn{1}{c}{[$10^{13}$~cm$^{-2}$]}&\multicolumn{1}{c}{}\\
\hline
clump~1&$(28{-}54)$\tablefootmark{a}&$23{-}31$&$0.4{-}1.1$\\
interclump &$(6{-}60)$\tablefootmark{b}&$(0.04{-}4)$\tablefootmark{b}&$7\times 10^{-4}{-}0.7$\\
&&$(0.04{-}0.4)$\tablefootmark{c}&$(7\times 10^{-4}{-}7\times 10^{-2})$\tablefootmark{c}\\
\hline
\end{tabular}
\tablefoot{\tablefoottext{a}{Assuming $n=10^6$~cm$^{-3}$.}
\tablefoottext{b}{Assuming $n=(5\times 10^3{-}5\times 10^4)$~cm$^{-3}$.}
\tablefoottext{c}{Assuming $T>50$~K.}}
\end{table}