“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	propositional function propositional inference propositional intermediate logic propositional logic propositional mu-calculus propositional quantifier propositional representation propositional system propositional value propositional variable propositional variable; sentential variable propositional μ-calculus Proposition Bank proposition bank proposition obtained by polarity proposition of divide conclusion form proposition or example as negative evidence proposition or example as positive evidence propositions or examples as evidence propotional relationship of national economy propoxur proppant prop people propranolol proprietary thesaurus

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