The semantics was what caused the problem, because the operator was expecting a particular kind of structure there.

引起问题的是语义，因为运算符需要的是,一种特定种类的数据结构。

麻省理工公开课 - 计算机科学及编程导论课程节选

So the assignment operator thus far makes copies of things.

所以到现在为止，赋值运算符复制了很多数据。

哈佛公开课 - 计算机科学课程节选

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