媽媽，湯姆弄得亂七八糟。
The radix point in the decimal numeration system. The decimal point may be represented, according to various conventions, by a comma, by a period, or by a point at the mid-height of the digits
The positive integer by which the weight of the digit place is multiplied to obtain the weight of the digit place with the next higher weight, for example, in the decimal numeration system the radix of each digit place is 10, in a biquinary code the radix of each fives position is 2.
