“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	railway sound barrier railways passenger car equipment railway station railway station and terminal railway structural deformation survey railway subgrade engineering railway subgrade maintenance railway subgrade non-destructive detection railway switch transition equipment railway tank car railway tanker railway technical station railway terminal railway ticket railway timber transportation railway time synchronization network railway track railway track maintenance and renewal railway traction network railway traffic accident railway traffic capacity railway traffic control railway traffic hygiene quarantine railway traffic volume railway train traction calculation

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。