比特(二进位数)，二进制中的最小信息单位，包括0或1。
BIT, in the binary number system, the smallest unit of information, consisting of a 0 or a 1.
传统的二进制计数系统具有链式进位，往往限制了计算机的运算速度。
The conventional binary number system has a carry chain which often limits the efficiency of computer arithmetic.
二进制编码的十进制数进行相加所需的从第3位到第4位的进位。
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.
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