驱动成本的关键变量是订单的大小和类型、特殊订单与标准订单等等，而不是在于高忠诚度还是忠诚度不同的客户。

The key variables driving cost are size and type of order, special versus standard order, and so on, not high-loyalty versus divided-loyalty customers.

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在清单5中，您有一个称为PO_ID的标准主键列(即订单id)。

In Listing 5, you have a standard primary key column called PO_ID (that is, purchase order ID).

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为此，我们选择使用一个简化的订单处理流程，该流程有点基于电信行业的标准化流程。

For that reason we've selected a simplified Order Handling process, loosely based around a standardized process from the telecommunications industry.

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