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谁能解释这个正则表达式^[\x21-\x3b\x3d\x3f-\x7e]*试图做什么?非常感谢您在这里的帮助。谢谢
它匹配字符串开头的零个或多个可打印的非空白ASCII 字符(从 0x21-0x7E;不包括<and )。>
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