We let the number of pairs at month 1 be 1.

实际上不是应该是1。

麻省理工公开课 - 计算机科学及编程导论课程节选

The question was how many rabbits do you have at the end of a year? At the end of two years? At the end of more than that number of years, and so. We can do this with the following level definition. We're going to let pairs of 0, the number of pairs at month 0, actually it would not be it would be 1.

在下一个月末的时候让我们假设,这2只小兔子也有了后代,同样是一公一母,问题是一年后你会有多少只小兔子？,两年后呢？更多年后呢？,我们可以用接下来的等级说明来解释，在第0个月有0对兔子。

麻省理工公开课 - 计算机科学及编程导论课程节选

I have shown that by taking Avogadro's number of individual ion pairs and putting them all together in a line, the system's energy became more negative.

我推导出了,从每一个离子对中抽出阿伏加德罗常数,再把它们放在一起在一列中，这个系统的能量就变得更负。

麻省理工公开课 - 固态化学导论课程节选

And then the number of pairs at month n is the number of pairs at month n - 1 plus the number of pairs at month n - 2.

我们让第一个月的兔子数是1对,第n个月的兔子对数,是第n-1个月的兔子对数。

麻省理工公开课 - 计算机科学及编程导论课程节选