“北京保卫战”的概念、定义、翻译、参考文献-科学参考

单词	北京保卫战
释义	北京保卫战 Encyclopedia 历史学政治史释 The defense of Beijing北京保卫战中国明代正统十四年（1449）蒙古瓦剌部骑兵在首领也先率领下攻打明朝首都北京，明朝军民在明景帝领导、于谦主持下开展的一场首都保卫战。
随便看	birnessite bi-rotation birotunda birret Birtel Birth birth-and-death process birth[-and]-death process birth and death process with catastrophes birth and death urn model birth control birthday birthday attack birthday bronze mirror for Emperor Xuanzong Birthday Opera Performance at the Qing Court birthday problem birth,death and catastrophe process birth death chain birth-death chain birth death process birth-death process birth defect birth defect prevention birth defects birth process

科学参考收录了854744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。