We've been using strings thus far to get input from user and store it in variables.

迄今为止，我们用字符串来接受用户的输入,然后存储在变量里。

哈佛公开课 - 计算机科学课程节选

When I'm talking to the interpreter, when I'm typing things in as I just did, to that Python environment, I'm getting what I'm going to call global bindings.

当我和解释器对话时,我会向我说的一样进行输入,输入到Python语言环境中,我会设置全局变量。

麻省理工公开课 - 计算机科学及编程导论课程节选