对于听力损伤的次要角色，您会确保为声音输出提供音量调节功能，为视频剪辑提供字幕，等等。

For a secondary persona with hearing impairment, you would ensure that you have provided volume adjustment capability for sound output, subtitles for video clips, and so forth.

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为简单起见，所有通知都是以音量级别100输出的。

All notes are printed at a volume level of 100 for simplicity's sake.

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注意如果当前的声音输出设备不支持音量控制(就像设备A2DP)，音量滑块就不会显示，取而代之的是设备名称。

Note that when the currently active audio output device does not support volume control (such as an A2DP device), the volume slider is replaced by the appropriate device name.

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