Left panel: outflow energy of the 314 clumps against the luminosity-to-mass ratio of central objects. The symbols refer to the same source type as in Figure 6, with black representing clumps with detected outflows and red indicating clumps with no outflows. It is shown that the clumps without outflows appear to have a range of turbulence energy similar to that of the clumps with no outflows. More interestingly, the level of turbulence is not significantly affected by the evolution of central sources in the clumps. Right panel: plot of outflow energy (﹩{E}_{\mathrm{out}}﹩) vs. the luminosity-to-mass ratio of central sources for the 153 clumps with mapped outflows. This suggests that higher outflow energies are associated with more evolved objects (i.e., larger value of ﹩{L}_{\mathrm{bol}}/{M}_{\mathrm{clump}}﹩).