“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	semi-periodic function semi-periodic solution semi-periodic spectrum semi-permanent sprinkler system semi-permeable membrance semipermeable membrane semi-permissible function semi-phenomenological semi-physical simulation training system semi pinacol rearrangement semi-pinacol rearrangement semi-plane semipolar semipolar set semipolar substrate semi-portable sprinkler irrigation semi-positive definite kernel semi-positive operator semipotentiometer semi-precompact semiprimary semiprimary number semiprimary ring semiprime semiprime differential ideal

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。