Events trigger a notification only if they are specified in the register call.

仅当在注册调用中指定了事件时，事件才会触发一个通知。

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The same trick can also apply to the call ringtone and notification tone.

同样的方法可以应用在电话铃声和提示音。

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The same trick can also apply to the call ringtone and notification tone.

同样的方法可以应用在电话铃声和提示音。

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