Relations among the main parameters. The different colors represent different temperature groups. First row: temperature versus the velocity dispersion, the column density versus the velocity dispersion, and the temperature versus the OPR (from left to right). The red points and black error bars are values of the fitted parameter and dispersion in Table 4. G14.99 is not included in the figure because of its extremely high value which is biased by the bright point source in the center of the core. Second row: relations between the Mach number and other parameters. Since the Mach number is calculated from both kinetic temperature and velocity dispersion, relations between these parameters are expected.