By changing a set of services that are subscribed to a particular topic, it is possible to completely change implementation of a composite service.
通过更改订阅到特定主题的一组服务，可以完全更改组合服务的实现。
By changing a set of services that are subscribed to a particular topic, it is possible to completely change implementation of a composite service.
通过更改订阅到特定主题的一组服务，可以完全更改组合服务的实现。
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