David Blei, of Princeton University, has therefore been trying to teach machines to do the job.
因此，普林斯顿大学的戴维·布莱试图通过机器来完成这项工作。
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"Today, we can easily store all this information and access it, but we need guides to find the most useful content," Blei says.
“今天，我们可以容易的存储和读取文档，但是我们需要指导着去找出最有用的内容”，Blei说。
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Blei says that such an approach could be added to search engines' ranking algorithms to identify important documents, and it could help users navigate vast collections of information more easily.