Her telephone number differs from mine by one digit.
她的电话号码跟我的差一个数字。
我计算错了一位数。
至少包括一个数字。
Since 2 has only one digit, return it.
因为2只有一个数字，所以返回2。
Pertaining to an operation involving more than one digit.
用于修饰或说明涉及多位数字的运算。
Given a non-negative integer num, repeatedly add all its digits until the result has only one digit.
给定一个非负整数，将该整数的所有数字的和作为新的整数，重复直至得到只有一个数的整数。
When rounding is required, consider only one digit in the decimal place to the right of the last place in the limit expression.
当修约是必需的，只考虑表达限值中最后一位右边的一位小数。
Locate digits 0-9 into the grid (no more then one digit per cell). Each digit is used exactly twice. Cells with digits cannot touch each other even by a corner.
在图中填入数字0-9各两个，每格最多填一个数字，填有数字的格子彼此不能有边或者角相接触。
A telephone scam in which a company sets up a toll number that is one digit different than a popular number, so that the company earns money when customers accidentally mis-dial the legitimate number.
指这样一种电话欺诈行为：一家公司设置一个收费电话号码，该号码与一个广受用户欢迎的号码仅有一个数字不相同。这样一来，在用户不小心把正确的号码拨错时，该公司便赚到了钱。
One digit always precedes the decimal point.
小数点前总有一个数字。
One digit can be used only once as an output, but countless times as a condition.
一个位用作输出只能一次，用作条件则可以无限次使用。
He could add two one-digit numbers only if he used his fingers.
查尔斯仅有的数学能力便是通过手指计算两个十以内加法。
He could add two one-digit numbers only if he used his fingers.
查尔斯仅有的数学能力便是通过手指计算两个十以内加法。
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