This is a very old concept and this is actually how people discovered websites before search engines even existed.

这是一个古老的概念，即便在搜索引擎还未出现时，人民实际上就已经使用它来发现网站。

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This mechanism ensures that users have proper authorizations on pages and portlets before search results are presented to them.

这种机制确保在向用户显示搜索结果前，他们必须对页面和Portlet具有正确的授权。

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Sometimes the search for alternatives enhances a manager's understanding of the problem, but because search is often expensive, the problem should be clearly defined before search begins.

寻找选择方案常常会加强经理对问题的理解。不过，寻找也常常需要较高的费用，所以在寻找之前，必需明确问题之所在。

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The experiment pushed the search for water several meters below the lunar surfacea much deeper than had been possible before.

VOA: special.2009.12.30

Should we sort before we search?

好的，让我们一起看看？

麻省理工公开课 - 计算机科学及编程导论课程节选

He died long before the search for Planet X resulted in the discovery of Pluto.

VOA: special.2010.07.11

"While they may not be needed during a walk, in the event of an accident, a casualty could be sitting in the snow and ice for over an hour before search teams reach them, " he said.

BBC: Wales snow: Rescuers' mountain walk equipment warning

Their view: Ticketmaster played the role of a search engine before there were search engines.

FORBES: Magazine Article

English Heritage had to give permission for the sett to be disturbed before the search and rescue efforts began.

BBC: Border terrier dog rescued from Alvechurch badger sett