SOA has made it possible for enterprises to take part in an ecosystem in which a business can be both a service provider as well as a service consumer, thus enabling a SOA-oriented value network.
在生态系统中，一项业务既可以是服务提供者，也可以是服务使用者，SOA已经使企业参与生态系统成为可能，可以实现一个面向SOA的价值网络。
A service consumer invokes a service provider through the network and has to wait until the completion of the operation on the provider side.
服务使用者将通过网络调用服务提供者，且必须等待，直到提供者一端的操作完成。
How can a consumer invoke a service quickly and reliably, because the network is actually slow and unreliable?
使用者如何快速而可靠地调用服务，而网络实际上很慢且不可靠？
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