With the wide application of electronic and laser technology in recent years,many wonderful books, like talking books, & quot; TV record & quot; Books and shrink tiny books, and so on.Talking books, is equipped with mini records or tapes in the book, some under the words printed on the pronunciation code, through electronic instrument can restore the voice of the people. Some children's books, with tiny record on the back cover and the stylus.Since the stylus contact record, the record of the rotation, can hear the sound of the appearance characters in the book.
Even more interesting is called & quot; TV record & quot; Book, also called & quot; Book, also called & quot; DVD & quot; , its shape like a regular record. It is through a special laser method, the images and sound recorded on DVD, watch, the disc player to the TV set, can put the images and sound reduction. According to the needs of study and research, but also can make the screen at any time to stop. Some important academic work or paper, published, can put some not easy to understand the principle and experiment situation of not easy to see, the book, not only many varieties, and some smaller and smaller.