pass-through解决方案是一种区域外(out-of-region)防护策略，在中介站(intermediate site) 提供动态配置储存群组，可减少整体储存需求，并运用分散地点确保最新资料副本的可用
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有了这一设计，我们就有了入站服务和出站服务的单独中介。
With this design, we can have separate mediations for the inbound and outbound services.
如果适用的话，中介还可以包括接收相关的入站响应消息，处理相关的响应消息，以及向请求者发送出站响应消息。
If applicable, a mediation can also include receiving a correlated inbound response message, processing a correlated response message, and sending the outbound response message to the requester.
网关提供的中介之一可以用于记录处于安全状态的入站消息，从而实现不可否认性。
One of the mediations provided by the gateway can be to log the inbound message in its secured state, thus facilitating non-repudiation.
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