“hydrogen maser”的概念、定义、翻译、参考文献-科学参考

单词	hydrogen maser
释义	hydrogen maser Encyclopedia 工学频率标准释 hydrogen maser氢钟以氢原子基态两个超精细能级间跃迁频率为参考（频率为1.420405751786吉赫兹），通过锁定环路来锁定晶体振荡器，使晶体振荡器能够输出高稳定度和高准确度时间频率信号的原子钟。氢钟采用的工作原子为氢原子，又称氢原子频率标准（简称氢频标）、氢原子钟。 Astronomy hydrogen maser氢微波激射
随便看	needleleaf sedge needle-leaved plant needle-leaved tree needle loom shaft Needleman-Wunsch algorithm needle point needle problem needle punched batt-on-base felt needle punched batt-on-mesh felt needle-punched carpet needle punching needle-punching density needle-punching depth needle-punching frequency needle retention method needle roller embroidery needle scanning needle-shaped variation needle-shaped wollastonite needle size needlet needle variation needle withdrawal method needling interlining needling sensation

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