“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	conformally flat space conformally flat structure conformally geodesic lines conformally invariant conformally invariant metric conformally invariant object conformal manifold conformal map conformal mapping conformal mapping in electromagnetic field conformal mapping onto itself conformal mapping theorem conformal mapping theory conformal map projection conformal martingale conformal measure conformal metric conformal net conformal Newtonian gauge conformal plane conformal projection conformal projection chart conformal property conformal radius conformal representation

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