King of Germany and Holy Roman emperor (1152–90). He made a sustained attempt to subdue Italy and the papacy, but was eventually defeated at the Battle of Legnano in 1176. He was drowned in Asia Minor while on his way to the Third Crusade.
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。