“The defense of Beijing”的概念、定义、翻译、参考文献-科学参考

单词	The defense of Beijing
释义	The defense of Beijing 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	direction cosine direction cosine algorithm direction curve direction density Direction des Archives de France Direction des constructions Aeronautiquue direction-determining board direction field direction finder direction finding receiver direction focusing directionless directionlet transform direction logarithm direction of arrival estimation Direction of Chinese Opera direction of drama direction of light direction of magnetization direction of main passenger flow direction of principal curvature direction of Quyi direction of recession direction of R^n direction of Rn

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。