Let me rewind slightly in the story so that I don't actually mislead because I forgot to update these two cells.

我们先倒回去一点,我没有误导，因为我忘记了,更新这两个单元。

哈佛公开课 - 计算机科学课程节选

So the very last two lines of code I'm saying this, s2 the original string is s1, the copy of the string is s2, but if I haven't lost you, what are we really going to see when we print this?

最后两行代码是这样的，原字符串是s1，那个字符串的拷贝是，但是如果我没有忘记，当我们打印的时候,我们将看到什么？

哈佛公开课 - 计算机科学课程节选