"The original idea for Stockbridge at Christmas was actually conceived in 1956,'57 when Hallmark card corresponds with Rockwell on the idea of an image of an American main street which will symbolize Christmas in America,"

VOA: standard.2009.12.25

They might very well be storing the addresses of memory elsewhere, but we just needed them as sort of a cheat sheet, a little address card to know where the original values x and y were.

它们存储在内存的其他地方是可以的,但是我们需要一个备忘单,一个地址卡，来知道,原始的值x和y是什么。

哈佛公开课 - 计算机科学课程节选