The AI companies contend that scraping publicly available data from the internet is legal, under the fair use doctrine of US copyright law.

人工智能公司辩称，根据美国版权法的合理使用原则，从互联网上抓取公开数据是合法的。

Instead, it has competing theories about whether or not data-mining without licences is permissible under the " fair use" doctrine.

相反，它有关于在“合理使用”原则下是否允许未经许可的数据挖掘的竞争理论。

Google has also attempted to claim an exemption to copyright under the " fair use" doctrine, which allows limited use that does not replace the original work.

谷歌还试图根据“合理使用”原则主张版权豁免，该原则允许有限度的使用，但不会取代原作品。