“philately commemorative postmark”的概念、定义、翻译、参考文献-科学参考

单词	philately commemorative postmark
释义	philately commemorative postmark Encyclopedia 工学集邮品释 philately commemorative postmark集邮纪念戳为纪念与集邮目的而刻制使用的专门戳记。包含两类性质完全不同的戳与章：一类是纪念邮戳，一类是纪念印章。
随便看	index of a geodesic index of a manifold index of a mapping index of an element index of an elliptic operator index of an operator index of a number index of a power index of a quadratic form index of a radical index of a recursive function index of a root index of a singular point index of a stable distribution index of a subgroup index of compactness index of connection index of correlation index of cycle index of diffraction index of dispersion index of diversification index of drilling engineering quality index of economic liberalization index of eigenvalues

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。