“秒长国家计量基准”的概念、定义、翻译、参考文献-科学参考

单词	秒长国家计量基准
释义	秒长国家计量基准 Encyclopedia 工学频率标准释 national primary frequency standard秒长国家计量基准直接复现秒定义的实验装置。输出的标准频率具有最高计量学特性，作为统一全国秒长量值（频率量值）最高依据的计量器具，全国只有一套。
随便看	combination of medicinals combination of medicine and education Combination of medicine and nursing combination of points of namesake channels，combination of points of namesake meridians combination of political and economic systems combination of prisms combination of sentences combination of several tunes combination of signs combination of source rock,reservoir and cap rock combination of sports and education combination of structure action combination of the nature and flavour combination of use and nourishment combination of vehicles Combination Principle combination principle combination printing combination printing machine combination reaction combination resonance combination resonator combination resonator, complex resonator combinations combination scattering

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。