/^(\[1-9\]{1})(\d{15}|\d{18})$/ 满足这个正则的

问题: /^(\\[1-9\\]{1})(\d{15}|\d{18})$/ 满足这个正则的是什么内容？

回答: 这个正则表达式可以用来校验一个字符串是否满足以下条件：以1-9之间的数字开头，后面跟着15位或18位数字。
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