The card number, a thirteen - or sixteen-digit string with a check digit.

信用卡号，13或16位数字组成的字符串，包括一个校验位。

youdao

Given a digit string, return all possible letter combinations that the number could represent.

给定一个数字字符串，返回所有这些数字可以表示的字母组合。

youdao

Given a digit string, return all possible letter combinations that the number could represent.

题目如下，输入一串数字，根据电话键盘布局输出此数字可能代表的字母组合。

youdao

Indeed, the last time we saw anything even approaching a 49-month double digit rate string was the 36-month string that gave us the housing boom turn bust turn Great Recession.

FORBES: The Next Great(er) Recession Now Baked In The Cake?

While this is still a startling string, we must underscore the point that for the first time in 51 months we did have to stretch our definition of double digit to keep the string going.

FORBES: US Monetary Watch, Monetary Inflation Decelerating?

The string of triple-digit losses is the Dow's first such slide since September.

WSJ: Dow Marks Third Triple-Digit Loss in a Row