楼上说的很多,我补(bǔ )充一下(xià ),正(zhèng )确的(de )应(yīng )该叫网络蜘蛛(zhū ),又称(chēng )爬虫,本质(zhì )是(shì )搜(sōu )索引擎派出的一(yī )个执行抓取(qǔ )任(rèn )务(wù )的程序蜘蛛(zhū )池的(de )本质是大量的网(wǎng )站互(hù )相链接(jiē ),每个(gè )站(zhàn )单(dān )独产生大量(liàng )的内容吸引(yǐn )蜘蛛来(lái )爬,几千个网站互链时,可(kě )以想(xiǎng )象蜘(zhī )蛛(zhū )的链接(jiē )
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