标准电池是很多电学标准实验室用作电压参考标准的电化学电池。

Standard cells are electrochemical cells used as voltage references in many electrical standards laboratories.

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为了建立和完善国家现代电学计量标准中扩展频段电容标准和检测体系，中国计量科学研究院立项进行“电容扩频”技术的研究。

So the capacitance metrology technology in high frequency cannot meet the need of testing for impedance metrology standards and the measurement instruments.

youdao

为了建立和完善国家现代电学计量标准中扩展频段电容标准和检测体系，中国计量科学研究院立项进行“电容扩频”技术的研究。

So the capacitance metrology technology in high frequency cannot meet the need of testing for impedance metrology standards and the measurement instruments.

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