“频率基准”的概念、定义、翻译、参考文献-科学参考

单词	频率基准
释义	频率基准 Encyclopedia 工学【电子计量】释 primary frequency standard频率基准直接复现秒定义的测量装置。又称秒长基准。
随便看	lead sulphide lead telluride lead tetraacetate lead tetraoxide lead tetroxide lead-through lead time lead-time lead tin alloy lead-tin alloy lead-tin-telluride lead track lead white leadwort family lead (Ⅱ) carbonate, basic lead(Ⅱ)chloride lead(Ⅱ)iodide lead(Ⅱ)nitrate lead(Ⅱ)sulfate lead(Ⅱ)sulfide leaf leaf-age models of crops leaf area index leaf area index， LAI leaf axil

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。