\begin{table}%t3
\caption{\label{tablethree}A summary of the PDR parameters for Tr~14. 
	The intensities (I) are in \mbox{erg s$^{-1}$ cm$^{-2}$ sr $^{-1}$.}}
%\centering
\par
\begin{tabular}{@{}lllllllll} 
\hline 
\hline
	Source 
	& Distance 
	& $I$([\OI] 63 $\rm \mu m$) 
	& $I$([\OI] 145 $\rm \mu m$ ) 
	& $I$([\CII] 158 $\rm \mu m$) 
	& $I$($^{12}$CO(1-0)) 
	& $I$(FIR) 
	& Log ($G$) 
	& $\epsilon$ \\  
\hline
	& kpc 
	& 10$^{-4}$ 
	& 10$^{-4}$ 
	& 10$^{-4}$ 
	& 10$^{-7}$ 
	&  
	& 10$^{4}~G_0$ 
	& 10$^{-4}$ \\ 
\hline 
	Tr 14 
	& 2.2 
	& 33 
	& 3.9 
	& 23 
	& 3.9 
	& 1.2  
	& $3{-}4$ 
	& 50 \\ 
	W49N
	& 11.4
	& 31--80
	& 4.6--12
	& 11--28
	& 4.6
	& 33.5
	& 5.5
	& 1.4--3.6 \\
	Orion Bar
	& 0.47
	& 400
	& 20
	& 60
	& 4
	& 5
	& 4.6
	& 110 \\
	M17 SW
	& 2.5
	& 150
	& 19
	& 26
	& 7
	& 6.7
	& 4.7
	& 47 \\
	30 Doradus
	& 49
	& 4.9
	& 0.4
	& 5
	& 0.1
	& 0.6
	& 3.7
	& 17 \\ 
\hline 
\end{tabular}  
\end{table}