A set of images and/or text embedded in a Web page which help users navigate around the Web site in which the page is embedded. Navigation bars are usually found at the top, bottom, or side of a 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。