如果讯息被拒绝，传送的应用程序可以要求传回负认可讯息至传送的应用程序。

The sending application can request a negative acknowledgment message be returned to the sending application if a message was rejected.

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如果讯息被拒绝，传送的应用程序可以要求传回负认可讯息至传送的应用程序。

The sending application can request a negative acknowledgment message be returned to the sending application if a message was rejected.

youdao