Holy Roman Emperor from 1152 to 1190; conceded supremacy to the pope; drowned leading the Third Crusade (1123-1190)
同义词：Frederick I??/??Frederick Barbarossa
Barbary pirate (died in 1546)
同义词：Khayr ad-Din
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。