british system of reference

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1.	英制参考系 36测量... ... "英制坐标格"," British grid" "英制参考系"," British system of reference" "广播星历"," broadcast ephemeris" ... www.guandang.com

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英汉双解词典包含2704715条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。