客户端调用服务组件处理订单。
The client invokes the service component to process the order.
服务组件具有处理订单和打印订单id的方法。
The service component has a method that processes the order and prints the order ID.
客服中心可以提供：电话订购、订单处理、产品售后、投诉建议等服务。
Customer service Center can provide: Telephone ordering, order processing, product sale, service complaints and Suggestions.
客服中心可以提供：电话订购、订单处理、产品售后、投诉建议等服务。
Customer service Center can provide: Telephone ordering, order processing, product sale, service complaints and Suggestions.
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