In my case, I wanted to only search official documents, and that's exactly what Google has done - returning results that are crawled from those pages only. No garbage, spam sites or erroneous data.

在我的例子中，我只要搜索官方文件，而这些正是Google已经做的：返回的结果中从包含设置的网站中抓取的，没有垃圾网站和错误的数据。

youdao

This war between spam sites and the search engines has no end.

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Stock-scam Web sites can reach millions instantly via spam E-mail and banner advertising at little or no cost.

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