如果他这么干，则序列号一定和我们所期待的不一样，这就保护了我们不受攻击者们扔消息的攻击。

If this occurred, the sequence Numbers would definitely be different than what we expected. This also protects us from an attacker dropping a message.

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有了此信息后，我们可以进行迭代，尝试从第一个序列号开始接收组中的所有其他消息。

With this information, we then iterate, attempting to receive all of the other messages in the group in sequence order starting at the beginning.

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为每条消息分配了相同的24位组标识符，且分别具有从1到5的逻辑序列号。

Each of the messages has been allocated the same 24-byte group identifier along with a logical sequence number running from 1 through 5.

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