In this system, the client requests that notifications be sent when they occur.

在此系统中，客户端请求在事件发生时发送通知。

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System Bar, for global status and notifications.

用于全局状态和通知的系统栏。

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Also, users can refuse to receive notifications system-wide.

同时，用户可以全系统地拒绝接收通知。

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Also, users can refuse to receive notifications system-wide.

同时，用户可以全系统地拒绝接收通知。

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