发现消息中的错误或者丢弃它们。

Faulting messages or dropping them.

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此时，当您测试时您可能会发现消息框实际上出现了两次。

Now, if you tested this out, you may have noticed that you actually got the message box twice.

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在许多情况下，发送二进制数据时，你可能会发现消息高度重复。

When sending binary data, in many cases, you might find that the messages are highly repetitive.

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