说明：  使用perl语言进行web数据挖掘。众所周知，互联网是一个巨大的数据源，使用perl语言，你可以轻易的挖掘网络信息。
(Any organization that spends money for marketing research or generating sales leads can benefit from building a web crawler. Instead of spending tens of thousands of dollars for a boxed market research survey, a web crawler can be used to ferret information from the web. )