Whenever I send a notification, I want to send a sequence number that allows client applications to sort the messages, should they show up out of order.
在发送通知时，如果消息顺序是混乱的，则要发送序列号，让客户机应用程序可以对消息排序。
Whenever I send a notification, I want to send a sequence number that allows client applications to sort the messages, should they show up out of order.
在发送通知时，如果消息顺序是混乱的，则要发送序列号，让客户机应用程序可以对消息排序。
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