A Web page which is invisible to someone browsing a Web site, because the site does not contain any hyperlinks to the page. Access to it is usually only granted to users who are sent the uniform resource locator of the page.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。