For example, potential energy due to gravity can be, for all practical purposes, completely transformed into kinetic energy and kinetic energy can be transformed back into potential energy.
(potential energy due to gravity; can be completely transformed; for all practical purposes) (potential energy due to gravity; transformed; into kinetic energy and kinetic energy)
potential energy due to gravity potential energy due to gravity
can be completely transformed transformed
for all practical purposes
into kinetic energy and kinetic energy