Either way, it doesn't matter, because the receiver has those sequence numbers, and if a duplicate packet arrives, it can be discarded.

无论哪种方式，都没有关系，因为接收方有那些序列号，如果重复的数据包到达，它可以被丢弃。

These sequence numbers allow a receiving computer to put the packets into the correct order, even if they arrive at different times across the network.

这些序列号允许接收计算机将数据包放入正确的顺序，即使它们到达网络的时间不同。