Append sticks the list on the end of the list, append flattens it, one level of course.

因此串联加操作符和append方法，是不同的，Append方法把一个数组。

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

First, the Treaty declared that the individual sovereign state would henceforth become the highest level of authority; you might say, putting an end once and for all " to the universalist claims of the Holy Roman Empire.

第一，条约宣称,各个主权国家,都因此而成为各自国家里最高的权力;,永远终结了,普遍意义上的“神圣罗马帝国。

耶鲁公开课 - 政治哲学导论课程节选