Table 4: Results of ensemble of identical clumps, Ensemble case 1. The mass and FUV field for each single clump are listed in Cols. (2) and (3); Cols. (4)-(6) present the line intensity ratios between the ensemble models and observations of 12CO 4-3, 12CO 1-0 and 13CO 1-0; the C, CO and H2 column densities from the ensembles are presented in Cols. (7)-(9); Col. (10) is the C/CO ratios. The total number of the clumps in the ensemble and ensemble mass are listed in Cols. (11) and (12); Col. (13) lists the beam filling factor of each clump. The total ensemble mass $M_{\rm ens}$ listed in the table is computed as $M_{\rm ens} = N_{\rm ens} \times M_{\rm cl}$, where $M_{\rm cl}$ is the mass of a clump.
Position $M_{\rm cl}$ $\chi_{\rm en1}$ $R_{\rm ^{12}CO 4-3}$ $R_{\rm ^{12}CO 1-0}$ $R_{\rm ^{13}CO 1-0}$ N(C) $_{\rm ens}$ N(CO) $_{\rm ens}$ N(H2) $_{\rm ens}$ C/CO $_{\rm ens}$ $N_{\rm ens}$ $M_{\rm ens}$ $\eta_{\rm bf,i}$
  $M_{\odot}$         1016[cm-2] 1017[cm-2] 1021[cm-2]     $M_{\odot}$  
Northern rim 0.32 10 0.63 0.67 0.87 13.97 18.58 7.72 0.075 4.59 1.47 0.17
Cluster 0.10 100 1.07 0.99 1.13 10.02 21.56 8.90 0.046 16.75 1.68 0.04
Ridge 0.32 32 0.95 1.13 0.95 8.90 29.49 11.29 0.030 6.72 2.15 0.08
Map center 0.10 32 0.94 1.05 0.97 13.25 34.24 13.05 0.039 24.56 2.46 0.04
$[C {\sc i}]$ peak 0.10 32 0.94 1.59 0.83 31.54 29.88 13.14 0.106 24.74 2.47 0.08
Western rim 0.10 10 0.78 1.43 0.71 24.52 9.33 6.10 0.263 11.51 1.15 0.17
Southern rim 0.32 1 0.84 0.81 0.74 14.62 6.28 3.03 0.233 5.70 1.82 0.17


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