The client code would either poll the output queue for the response or wait for some kind of call-back notification when the response message has been delivered.
客户机代码将轮询输出队列以获得响应，或等待响应消息交付时的回调通知。
The client code would either poll the output queue for the response or wait for some kind of call-back notification when the response message has been delivered.
客户机代码将轮询输出队列以获得响应，或等待响应消息交付时的回调通知。
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