网络爬虫是一个可以从因特网上自动提取网页的系统，它为搜索引擎从万维网上下载网页，是搜索引擎的重要组成。

Web crawler is a system which can automatically get web pages from Internet. It helps searching engine download web pages, so it is an important part of searching engine.

youdao

网络爬虫是一个可以从因特网上自动提取网页的系统，它为搜索引擎从万维网上下载网页，是搜索引擎的重要组成。

Web crawler is a system which can automatically get web pages from Internet. It helps searching engine download web pages, so it is an important part of searching engine.

youdao