“national primary frequency standard”的概念、定义、翻译、参考文献-科学参考

单词	national primary frequency standard
释义	national primary frequency standard 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	real-time data real-time data analysis real time database real-time database real-time data processing Real Time Data Service real-time decision making real-time detection real-time determination real-time display real time dynamics real-time engineering design real-time executive real-time feedback analysis during construction real-time fluorescence polymerase chain reaction real time fluorescence quantitative polymerase chain reaction Real time forecasting real-time forecasting real-time generation of perceptual information in virtual environment real-time holographic interferometry real-time holography real-time interferometry real-time kinematic carrier phase difference technology real-time kinematic positioning real-time kinematic survey

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。