除声明的业务异常外，客户端还可以接收系统异常，如发送消息时发生的连接错误。

In addition to the business exception declared, the client can receive system exceptions such as connection error that happens while sending the message.

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在生产应用程序中，您很容易找到此功能的多种用途，如发送密码提醒和定期订户邮件。

In a production application, you will likely find many USES for this capability, such as sending out password reminders and periodic subscriber mailings.

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Galaxy内部服务和制品的重要改变会触发一个内部事件，它可以触发一些动作，如发送通知或应用远程策略。

Event API -important changes to services or artifacts inside Galaxy trigger an internal event, which can result in actions such as sending notifications or applying remote policies.

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