A packet provides not only data, but a short bit of information about that data.
包不仅提供了数据，还提供了关于数据的简单信息。
Each data packet sent over the Internet contains information about its source and its destination.
每一个通过因特网传递的数据包都包含有它的来源和目的地。
Each data packet sent over the Internet contains information about its source and its destination.
每一个通过因特网传递的数据包都包含有它的来源和目的地。
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