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问的通义。 问题： 域名合法字符有哪些？ 回答： [image] 追加如上图红框为什么，回答如下图 [image] 我理解的 a - - bcd.com 这样2个线应当不允许，但是 a - bcd.com不允许真没搞懂。 哪位大佬用通俗易懂语言描述一下？ 阅读原文
