301短期使用效果观察
用了301以后，老博客的 补充材料数量并没有大量增加。
基本维持原来数量。
应该是 GG对老博客不再索引，然后不再更新。
而从老博客转移过来的文章。绝大部分并没有造成复制材料。
June 6, 2007
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