The book CD is book accessory, which explain the book contents with diagram, voice and image.

随书光盘是图书的附件，对图书内容进行图文声像的说明、解释和演绎。

youdao

The book CD is book accessory, which explain the book contents with diagram, voice and image.

随书光盘是图书的附件，对图书内容进行图文声像的说明、解释和演绎。

youdao