求翻译：式中 为平均速度梯度引起的湍流动能产生项； 为湍流动能； 为耗散率； 为液体的运动粘度， ， ， ， =0.09[13]。 和 分别是与湍流动能和耗散率对应的Prandtl数。是什么意思？

Where the average velocity gradient caused by the turbulent kinetic energy production term; for the turbulent kinetic energy; for the dissipation rate; for the liquid kinematic viscosity,,,, = 0.09 [13]. And are the turbulent kinetic energy and dissipation rate with the corresponding Prandtl number.

In the formula for average velocity gradient caused by the turbulence kinetic energy generated turbulence kinetic energy for dissipation rate; for the Campaign; for liquids, viscosity, and that = 0.09 [ 13 ]. And respectively with turbulence is kinetic and dissipation rate Prandtl corresponding to t

In the formula the turbulent kinetic energy which causes for the average velocity gradient produces the item; For turbulent kinetic energy; For dissipation rating; For liquid kinematic viscosity, =0.09 [13). With respectively is and the turbulent kinetic energy and the dissipation rating corresponde

Average speed gradient caused by the turbulent kinetic energy produced; for the turbulent kinetic energy; for dissipation rate; for kinematic viscosity of the liquid,,,, =0.09[13]. And are the corresponding to the turbulent kinetic energy dissipation rate of the Prandtl number.

Where the average velocity gradient caused by the turbulent kinetic energy production term; for the turbulent kinetic energy; for the dissipation rate; for the liquid kinematic viscosity,,,, = 0.09 [13]. And are the turbulent kinetic energy and dissipation rate with the corresponding Prandtl number.