“郑和下西洋”的概念、定义、翻译、参考文献-科学参考

单词	郑和下西洋
释义	郑和下西洋 Encyclopedia 历史学中外关系释 Zheng He's Voyages to Western Seas郑和下西洋 1405～1433年，郑和率领船队7次出使亚非30多个国家和地区，是中国航海史和外交史上的重大事件。
随便看	Positioning system positioning technology based on the ground mobile network position inversion operator position line position location reporting system position matching position measurement position micrometer position of a game position of point symmetry position of readiness for action position of similarity position of symmetry position of the conduction band position of the people's police position of the valence band position on stage position operator in position representation position parameter position plane position point position reporting position representation position retrieval Positions and Proper Motions Star Catalogue

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。