“international recommended values of standard frequencies”的概念、定义、翻译、参考文献-科学参考

单词	international recommended values of standard frequencies
释义	international recommended values of standard frequencies Encyclopedia 工学时间频率计量释 international recommended values of standard frequencies国际标准频率推荐值由国际计量委员会（CIPM）推荐的一组电磁辐射标准频率值。为包含实际复现米定义和秒的次级表示在内的应用而设立。
随便看	permanent magnet starting generator permanent-magnet synchronous motor permanent matrix permanent military airfield permanent mold casting permanent moment permanent of a matrix Permanent Palace Guard permanent residence register permanent resident registration form permanent residents permanent rotating magnetic field separator permanent rotation permanent rural residents permanent scatterer SAR interferometry permanent shadow region permanent slope permanent sprinkler system permanent succession permanent summation permanent swap file permanent threshold shift permanent threshold shift，PTS permanent tooth permanent way overhaul train

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。