“Zheng He's nautical maps”的概念、定义、翻译、参考文献-科学参考

单词	Zheng He's nautical maps
释义	Zheng He's nautical maps Encyclopedia 工学古海图释 Zheng He's nautical maps《郑和航海图》根据明代航海家郑和（1371或1375～1433或1435）自永乐三年（1405）起，多次远航印度洋的有关资料整理加工而成的作品。全名为《自宝船厂开船从龙江关出水直抵外国诸番图》，一般简称为《郑和航海图》。
随便看	positive logic positive logical calculus positive logical formula positive lossless storage positively definite positively definite form positively definite kernel positively definite matrix positively definite quadratic form positively graded module positively invariant subspace positively oriented base positively semi-definite positively stable point positively stable solution positive manifold positive map positive mapping positive mass conjecture positive matrix positive measure positive metric positive/negative helicity spinors positive number positive octant

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。