This regular expression has a bunch to digest, but if you walk through it a few times, you can see that this is what a URL has to look like.

这个规则表达式有许多内容有待理解，但如果多看几遍，您就会明白这就是URL的格式。

youdao

This regular expression has a bunch to digest, but if you walk through it a few times, you can see that this is what a URL has to look like.

这个规则表达式有许多内容有待理解，但如果多看几遍，您就会明白这就是URL的格式。

youdao