就错误页面来说，在搜索引擎的本地知识库中，它可能被链接到一个有效的URL。

In the case of an error page, it may be linked to a valid URL in the search engine local repository.

youdao

该文件暗示搜索引擎不应搜索某些特殊页面，例如错误页面。

This file hints to the search engine that it should not index particular pages, such as error pages.

youdao

此类重定向提交的是302或301代码，通常这会告诉搜索引擎将你的错误页跟许多不同的URL一起索引起来。

Those redirects deliver a 302 or 301 code, which usually tells search engines to index your error page at many different URLs.

youdao