中原威科一、发布时间
发布时间在凌晨一点左右，曾有站长说过，由于凌晨大部分网站不会更新，所以整个网络的更新量很小，在这个时间更新百度会更容易收录。个人认为，搜索引擎对网站的抓取时间不尽相同，也许你在凌晨更新后蜘蛛并未过来抓取，而是发不完之后几个小时候才来抓取，比如我的小站，百度每天的抓取压力为5，比较悲催，呵呵。由于看不到服务器日志，所以这个问题有待研究。
二、页面相似度
两篇文章内容文字都占页面总文字的50%以下，这个是我粗略估计的。有一种说法，内容相似度在50%以下的页面更容易被搜索引擎收录，关于页面相似度的检测方法可以搜索一下。所以我认为页面相似度可能占一部分原因。
三、链接
两篇文章内容部分未加一个链接，无论内链还是外链，一般来说一篇文章加两三个链接应该没什么问题，你会看到很多页面一篇文章内密密麻麻的都是内链，比如百科。。。权重高，不跟他比。反正我觉得新浪博客一般不加外链收录很快，加了外链内容质量好一点收录会稍微慢，质量不行的直接不收录。内容链接这个东西值得研究一下。
四、Ping
发完文章后Ping一下，让搜索引擎知道你更新了，从而及时抓取页面。这个问题以后再发两篇文章做个测试吧。
五、标题
标题很重要，一般来说标题都要尽量个性、与众不同，但搜索引擎索引的页面中也不乏标题一模一样的页面，比如也许你在新浪发布了一篇文章，没有被收录，或者排名不是很好，被别人转载之后却被收录或者获得了不错的排名。这个说法可能会被大神说是胡吹八咧，但确实有这种情况出现，并非所有，而大神们又不会告诉你为什么。。。所以自己猜吧。
暂时就这么多，有新发现了在说吧~
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由意外的收录引发对搜索引擎收录的猜测