如果符合条件的消息不存在，操作并不会等待消息的出现。它只是简单地用一个新的刷新间隔周期来组装一个刷新响应并将它返回给调用者。
If no message exists, the operation does not wait around for one; it simply prepares another refresh Response with a new refresh interval period and returns that back to the caller.
当在目标中加载或刷新了集成数据之后，可以将整合信息公开为服务提供给使用者。
After the integrated data is loaded or refreshed in the target, the consolidated information can be exposed as a service to consumers.
许多跑步者借助他们的GPS表不刷新自己速度与距离。
Many runners swear by their GPS watches that constantly update pace and distance.
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