It relates changes in three kinds of energy densities in the fluid: the gravitational potential energy density, the translational kinetic energy density, and a potential-like energy due to pressure.
(It; relates; changes in three kinds of energy densities in the fluid: the gravitational potential energy density, the translational kinetic energy density, and a potential-like energy due to pressure)
It
relates
changes in three kinds of energy densities in the fluid: the gravitational potential energy density, the translational kinetic energy density, and a potential-like energy due to pressure