The number of binary digits required to express a number in another base with the same precision,e.g., approximately 313 binary digits are required to express in binary form each digit of a decimal number. For the case of coded decimal notation, the number of binary digits required is 4 times the number of decimal digits.; 用二進制數(shù)表示具有同樣精度的其它基數(shù)的數(shù)時所需的位數(shù)。如以二進制形式表示十進 制數(shù)的每一位,大約需要313個二進制位。而用二進制對十進制進行編碼時所需的二進制位是 十進制位的4倍。