The supply and demand relation runs through the whole level of supply chain.

供需关系贯穿供应链的整个过程。

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The main body of learning, from the micro level, are the employee of enterprises while from the level of supply chain, are the enterprises themselves as members.

学习的主体从微观层面讲是企业的员工，从供应链的角度看，则是各个成员企业。

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This model applies parameters from operation level to strategic level of supply chain and it makes the core firms assign the production of materials and components more flexibly.

通过该模型可将企业运作层的参数与供应链战略层的决策变量结合在一起，使供应链核心企业能够更加灵活的对原料与配件进行整体生产指派。

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Moreover, one would expect reductions in job security to require a compensating differential even to maintain the current level of supply.

FORBES: Compensating Teachers for Riskier Jobs

Euro corporate bond sales fell sharply in February, as January's bumper level of supply as well as earnings updates and heightened political concerns in southern Europe dragged on potential deals.

WSJ: Companies Slow Down Their Euro Bond Sales

Certain raw materials like grains ( NYSE:JJG ) have a somewhat fixed level of supply and no attempt to increase that supply, such as fertilizer improvements through companies like Monsanto ( NYSE:MON) have been developed to meet that supply.

FORBES: Unraveling the Economic Recovery That Wasn't and How to Invest Through the Declines Ahead