Because it challenged the whole class system, that people are born into a certain place and cannot-- and should not-- be moved.

因为它挑战了整个阶级体系，人生来就有阶级，不能-,也不应该被改变。

哈佛公开课 - 幸福课课程节选

As we've seen systematically in the don't-takes, the only thing that gets changed is the index.

当我们系统的看这些,不应该装的物品时，唯一改变的是索引值。

麻省理工公开课 - 计算机科学及编程导论课程节选