“时间频率计量”的概念、定义、翻译、参考文献-科学参考

单词	时间频率计量
释义	时间频率计量 Encyclopedia 工学时间频率计量释 metrology in the field of time and frequency时间频率计量利用秒作为基本单位的测量及其应用的科学。是实现时间频率相关量单位统一、量值准确可靠的活动，计量学的分支之一。
随便看	effective cross-section of collision effective cross-section of ionization effective cross-section of recombination effective curve effective cutoff effective cutoff frequency effective cycle effective damping constant effective definition effective degree effective demand effective density of dense medium suspension effective derivation effective descriptive set theory effective diameter of objective effective Diophantine approximation effective discharge effective distance effective divisor effective domain effective dose effective elastic thickness effective enumeration effective equivalent dose effective equivalent dose rate

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