Take an example, when cold and heat reach the balance point, then the water is formed, when cold goes away, only the heat leaves, the water changes to air, when heat of the water goes away ,only cold leaves, the water freezes to ice.
(heat of the water; goes; away) (cold and heat; reach; the balance point) (the water; freezes; to ice; T:when heat of the water goes away) (the water; is formed; T:when cold and heat reach the balance point; T:then) (cold; goes; away) (the water; changes; to air)
heat of the water cold and heat the water the water cold the water
goes reach freezes is formed goes changes
away
the balance point
to ice T:when heat of the water goes away
T:when cold and heat reach the balance point T:then
away
to air