求翻译：在国际贸易供应链中,每个贸易伙伴既是其客户的供应商,又是其供应商的客户。他们既向其上游的贸易伙伴订购产品,又向其下游的贸易伙伴供应产品。尽管实际形态非常复杂,但其目标是:以最少的成本,在适当的时间和地点,将满足合适 质量水平的产品或服务交付给客户。该目标也可描述为5Ｒ最小化问题。是什么意思？

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In the international trade supply chain, each trade partner not only is its customer supplier, also is its supplier's customer.They both to its upstream trade partner order product, and to its downstream trade partner supply product.Although the actual shape is extremely complex, but its goal is: By

In the international trade supply chain, each trade partner is both a supplier of its clients, customers and their suppliers. They order products from its trading partners in the upper, and supply of products to its downstream trading partners. Although the actual form is complex, but the goal is to

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