OK, and you can see that this thing ought to unwrap, it's going to keep extending out those multiplications until gets down to the base case, going to collapse them all together.

好，你可以看到这种方法,是怎么解决的,他一层层的将乘法展开一直到最底层,然后将他们一起乘起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

At that point we're in the base case and we can unwrap this computation.

在这一步我们就是属于基础事件了,也就是说我们可以打开这个计算了。

麻省理工公开课 - 计算机科学及编程导论课程节选

And I unwrap the computation to get back.

最后我便可以打开计算返回最初嵌套了。

麻省理工公开课 - 计算机科学及编程导论课程节选