如果值不是String，则可以展开行显示对象。

If the value is something other than a String, then the row can be expanded to reveal the object.

youdao

此外，显示对象所需的内存根据正在执行的操作而变化。

Additionally the memory needed to represent an object can vary depending on the action being performed.

youdao

例如你可以用线框效果显示对象，只显示对象的边角等等。

For example you can display objects as wire-frames, display only the corners of an object and so on. You can even make objects transparent, with the following Settings.

youdao

How do we typically print things, we convert them to strings.

我们一般是怎么显示对象的呢？,对，把它们转换为字符串。

麻省理工公开课 - 计算机科学及编程导论课程节选

So str is basically telling us how we want to have it printed out.

因此str基本上也就告诉我们,怎么来显示对象了。

麻省理工公开课 - 计算机科学及编程导论课程节选