收到新消息时软件会发出声音，如果屏幕锁定，则会发出嗡嗡声。

The app makes a sound when a new IM appears, or a buzz if the screen is locked but the app is running.

youdao

收到新消息时软件会发出声音，如果屏幕锁定，则会发出嗡嗡声。

The app makes a sound when a new IM appears, or a buzz if the screen is locked but the app is running.

youdao