使用模板方法实现中介模式的桥接角色，这种做法提供了一种可以在将来添加外部通信备用类型的机制。
Using the template method for implementing the bridge role of the broker pattern provided a mechanism for adding alternative types of external communication in the future.
使用模板方法实现中介模式的桥接角色，这种做法提供了一种可以在将来添加外部通信备用类型的机制。
Using the template method for implementing the bridge role of the broker pattern provided a mechanism for adding alternative types of external communication in the future.
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