We could have packed more information into each byte, but it would have obscured the purpose of the example.
我们本来可以在一个字节中包含更多的信息，但是这样可能会使这个例子的本意变得模糊。
2
The carry from bit3 to bit4 needed for adding packed binary coded decimal number correctly, where two binary coded decimal digits reside in one8-bit byte.