“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	double-width weave double β decay double β-decay double－column disconnector doubling doubling bifurcation doubling operator doubling technique doubling the cube doubling time doubly-adaptive biased coin design doubly binary form doubly connected doubly connected domain doubly connected space doubly even number doubly even symbol doubly-fed asynchronous genertor doubly fed electric machine doubly heavy-flavored hadron doubly heavy flavor physics doubly infinite sequence doubly interval censored data doubly invariant doubly irreducible element

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