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I don't really understand regular expressions.我真的不明白正则表达式。 Can you explain them to me in an easy-to-follow manner?你能用一种易于理解的方式向我解释它们吗？ If there are any online tools or books, could you also link to them?如果有任何在线工具或书籍，您是否也可以链接到它们？
解决方案：
参考一： https://en.stackoom.com/question/1EO参考二： https://stackoom.com/question/1EO