The article explains in brief what is good about Web directories and specialized search engines and what their limitations are.

文章简要解释了什么是有关Web目录和专业搜索引擎和自己本身的条件很好。

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On the simplest level, the vertical search buyer is a marketer that wants to be found by the user of one of these specialized search engines.

在最简单的水平，垂直搜索买方是一个销售商说，希望能够发现用户的其中一个专门的搜索引擎。

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"Show them a variety of ways to find answers to questions: search engines, encyclopedias, specialized reference books at the library."

给他们展示多种寻找答案的方法，比如：搜索引擎，百科全书，图书馆里特别的参考文献。

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Some commentators, including blogger Jeff Jarvis, question the value of specialized search engines, likening them to fences that disrupt the "open prairie" of the Web.

FORBES: IAC's Minority Interest