“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	soil moisture constants soil moisture content soil moisture forecasting soil moisture for grassland soil moisture investigation soil moisture-monitoring instrument soil moisture monitoring instruments soil moisture monitoring station soil moisture movement for irrigated grassland soil moisture observation soil moisture regimes soil moisture retaining soil moisture tension soil monitoring soil morphological characteristics soil morphology soil nailing wall soil nailing wall support soil natural residual magnetism soil nematode soil nitrogen soil nitrogen cycle soil nourishing system soil nucleic acid extraction soil nutrient

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。