而且副产品交换或工业共生的成功与否取决于具体的技术条件、市场需求以及相对规模等许多不确定因素，工业共生还没有被工业企业所广泛认同和实施；
What's more, the success of by-product exchange or industrial symbiosis depends on many uncertainties such as concrete technical conditions, market demand and relative scale, etc.
当你专注于喜乐时，要采取的行动和可以交换的财物只是副产品而已。
Actions to Be Taken and Possessions to Be Exchanged Are By-products of Your Focus on Joy.
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