If no message is found, the main thread sleeps for 10 seconds.
如果未找到任何消息，主线程休眠10秒钟。
When an implicit federated trusted connection attempt fails, no message is returned.
当隐式联合可信连接尝试失败时，不会返回任何消息。
Additionally, one may specify that processing should continue if no message is received in a given time.
此外，您可以指定如果在给定的时间内没接收到消息，那么处理将继续进行。
If you don't know what you want, there's no message to deliver and no basis for connecting with other people.
假如你不知道你想要的是什么的话，你就不会去向别人传达某种信息，同时也没有和对方建立联系的基础。
Rather than continuously checking to see if my queue has a message, I provide a sleep function that waits 30 seconds in the event that no message was retrieved.
我没有不断检查看我的队列是否有消息，我提供了一个休眠函数，如没有检索到消息就等待30秒。
Preventing errors from occurring is always better than helping people correct them once they occur. The best error message is no message at all.
防止错误发生往往比发生错误后帮助人们纠正更好。最好的错误消息是完全没有错误消息。
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.
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.
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。
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