It was subsequently followed by several other academic search engines, many of which are now public companies.

但随后，产生了几个学院派的搜索引擎，其中有不少现在已经是公开的上市公司了。

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All of this is facilitated much more easily by the Internet, library and academic search engines than it is by a huge shelf of books.

比起在巨大的书架前翻检，所有的这一切工作，在有了互联网、图书馆和学术搜索引擎之后，变得越来越容易。

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Despite the importance of large-scale search engines on the web, very little academic research has been done on them.

尽管大型搜索引擎在网络上的重要性，很少对他们进行学术研究。

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