Identify the logical position of each message within the group.
标识每个消息在组内的逻辑位置。
A destination is the logical target for each message that is sent to the bus.
目的地是每一条发送到总线上的消息的逻辑目标。
In the logical explanation and negative message, explain roaming charges and why they occur.
按照合理的解释和否定的信息去解释为什么发生漫游费。
In the logical explanation and negative message, explain roaming charges and why they occur.
按照合理的解释和否定的信息去解释为什么发生漫游费。
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