A reservation service may need access to scheduling information, while a shipping service may need to call said reservation service to arrange for a particular inventory item to be sent to a customer.

一个预定服务可能需要有权安排信息，而一个发货服务可能需要调用上述的预定服务来安排一个特定的发送给客户的存货条目。

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An Invoicer service provider provides the InvoicingProtocol service for calculating the initial price for a purchase order, and then refines this price when the shipping information is known.

Invoicer服务提供者为计算定购单的最初成本提供了InvoicingProtocol，然后当运送信息得知以后重新定义这一价格。

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An invoicing service provider provides the invoicing interface for calculating the initial price for a purchase order, and it then refines this price when the shipping information is known.

货品计价服务提供者为计算订货单的初始价格提供Invoicing接口，当交付信息得到之后，它重新定义这一价格。

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