The essence of a book, its soul, can exist as bits of binary information on a reel of magnetic tape. 一本书的精华和灵魂作为二进制信息存储在磁带上。
When the binary input changes value there is a delay due to the time it takes the signal to propagate from the input of the gate to the output of the gate. 当二进制信息被输人以后，从输人栅门到输出栅门要消耗一段时间。
