“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	direct appraisal method direct approximation direct ascent direct assessment direct-associative cache direct attached storage direct attached storage, DAS direct attack direct band gap direct band gap semiconductor direct bandgap semiconductors direct bioleaching direct blowing pulverizer direct bonding direct borohydride fuel cell direct borohydride/H_2O_2 fuel cell direct boundary element method direct boundary point direct boundary reduction direct broadcasting satellite Direct Broadcasting Satellite (DBS) Service direct broadcast satellite direct broadcast satellite, DBS direct burial fiber cable direct carbon fuel cell

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