“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	Island culture Island Dispute Case island ecological restoration island ecology destroying island effect of poverty island fog Island Hopping island-mainland datum connection survey island of automation island of expertise Island of Gorée of Senegal World Culture Heritage island of inversion island of isomerism Island of Newfoundland island of stability island of stability; stability island island of superheavy element island of superheavy elements Island of Time island protection planning island-reef image database island shelf Islands Klocka islands link works island slope

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。