无论自然界物流，还是社会界物流，经济界物流，都具有这四个方面属性(RPMF)。
Either the natural circle material flow or the social circle material flow and the economic circle material flow are all having the four attributes (RPMF).
人造土壤机制体现出人类社会和自然界中，物质平衡、物质转化、物质流动与物流循环的运动过程。
The mechanism of artificial soil represents the movement process of material balance, material conversion, material flow and circulation of materials in the human society and nature.
人造土壤机制体现出人类社会和自然界中，物质平衡、物质转化、物质流动与物流循环的运动过程。
The mechanism of artificial soil represents the movement process of material balance, material conversion, material flow and circulation of materials in the human society and nature.
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