你可以加入一个变量，因为它不是封装在花括号里，就像我们刚才讨论的，本质的意思是它可以在文件的所有地方，都可以被访问到。

You can put a variable there, and because it's not encapsulated in curly braces, as we just discussed, that essentially means it's accessible everywhere in that file.

youdao

我刚才的意思是说：我们可以看这个录影带，它可以传输我们当下正在进行中的谈话内容，这将意味着人们通讯能力的提高。

What I mean is this: Here you can see the type of tape which will transmit this very conversation immediately, and this indicates the possibilities of increasing communication.

youdao

但是你刚才用racket这个词代替noise，它们的意思一样嘛？

But did you just replace the word noise by racket? Do they have the same meaning?

youdao

You can put a variable there, and because it's not encapsulated in curly braces, as we just discussed, that essentially means it's accessible everywhere in that file.

你可以加入一个变量，因为它不是封装在花括号里，就像我们刚才讨论的，本质的意思是它可以在文件的所有地方,都可以被访问到。

哈佛公开课 - 计算机科学课程节选