Anything that's not indexed by a search engine, as in, anything that you can't pull up on Google so it's not ending in a normal domain, dot com, dot gov, dot org, it is part of the deep web.
任何未被搜尋引擎編入索引的東西,也就是因為網址結尾不是正常 .com、.gov、.org,所有谷歌找不到的網站,就是深網的一部份。