Supply chain is a network which is used to describe activity of each entity and their mutual relations in purchase, production and sale processes of an enterprise.

供应链是描述企业采购、生产、销售过程中各实体活动及其相互关系动态变化的网络。

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Starting with composing of practical supply chain system, we analyze the entity elements and their action process in the system.

从实际供应链系统的构成入手，分析了供应链的实体元素和活动过程。

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This implies that voluntary adherence eventually becomes a standard practice and a necessary requirement if an entity wants to stay in business as part of the international trade supply chain.

这意味着，如果一个企业希望保有国际贸易供应链中的一席之地，自愿遵守的计划最终会成为一种标准做法和必要条件。

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The chamber and AFL also have agreed to create a new federal bureau to inform Congress and the public about labor supply issues, but the role of that entity remains unclear.

WSJ: Business, labor still at odds on temporary workers