二进制系统的基数为2，且从小数点每左进一位或者右退一位，其权增加或者减少2幂次。
In binary system the radix is 2, and the positions to the left or right of the binary point carry weight increasing or decreasing in power of 2.
十进制系统的基数为10，且从小数点每左进一位或者右退一位，其权增加或者减少10的幂次。
In the decimal system the base or radix is 10, and each position to the left or right of decimal point presents an increased or decreased weight as power of 10.
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