Web-search engines such as Google and Yahoo use a sophisticated algorithm to match and rank Web pages to search terms, but they still use this standard search technique.
As well as ranking Twitter feeds, the technique allows the team to rank individual tweets themselves by measuring how far they have spread through the network.
除了给twitter消息源排名，这一技术还能够通过测量消息传播多远来给每条twitter消息排名。
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This technique was very useful and would definitely make different way before but today it will only accounts for up to 15% completeness in your site Page Rank on search engines.