Part III The Cycle-transformation Theory of Ecological Economy System 2.The energy-flow transformation and entropy 2.1 The energy-flow is one-way flow.It is irreversible. 2.2 The energy-flow in E.E.S is progressively decrease. 2.3 The pyramidal law of energy transformation is corresponding with the principle of entropy increase.Part III The Cycle-transformation Theory of Ecological Economy System 2.The energy-flow transformation and entropy 2.1 The energy-flow is one-way flow. It is irreversible. 2.2 The energy-flow in E.E.S is progressively decrease. 2.3 The pyramidal law of energy transformation is corresponding with the principle of entropy increase