Distributions of kinematic parameters derived from the ¹²CO and ¹³CO observations. (a) FWHM of the ¹²CO and ¹³CO lines. (b) Three-dimensional velocity dispersion (σ_3D). (c) Nonthermal velocity dispersion (σ_NT). (d) Mach number, ﹩{{ \mathcal M }}_{{}^{13}{\rm{CO}}}={\sigma }_{{\rm{NT}}}/{c}_{s}﹩ histograms show the TRAO data (this work) and the PMO data from Y. Wu et al. (2012). Solid curves represent lognormal fits with the best-fit parameters (μ, σ) indicated.