Graphics and audio support are not necessary, as this system may not even have a monitor or speakers.
图形和音频支持并非必要，因为此系统甚至可能没有显示器或扬声器。
2
The information is stored in the display and is used to communicate with the system through a display Data Channel (DDC), which rests between the monitor and the PC graphics adapter.
这些信息保存在display节中，用来通过一个DDC (display Data Channel)与系统进行通信，这是在显示器和PC图形适配器之间进行的。
3
If the system will play video, the graphics interface must support your monitor or television.