现有必要对一个有序数据集合重复进行一系列有序操作组成的运算。

It is necessary to perform an computation repeatedly, composed of a series of ordered operations on a set of ordered data.

youdao

OWL支持基本的集合操作，即并，交和补运算。

OWL supports the basic set operations, namely union, intersection and complement.

youdao

I can write it explicitly. I can write it inside of a FOR loop. And we've started to add, and we'll see a lot more of this, examples of collections of structures so that we don't just have to do something that can be easily described as walking through a set of things but can actually be a collection that you walk through.

我可以明确的写出来,我可以把它在FOR循环的内部写出来，然后我们开始学习了add这个运算符,我们会在以后学习很多的,集合的数据结构的例子,这样一来我们可以进行一些,很简单的遍历集合的操作,我想要为大家指出的最后一件事情是。

麻省理工公开课 - 计算机科学及编程导论课程节选