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Primary frequency regulation is the important means to maintain the frequency stability of power systems.
一次调频功能对维持电网的频率质量和运行稳定性至关重要.
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The cesium atomic fountain used laser cooling and trapping is a new generation primary frequency standard.
应用激光冷却与囚禁的铯原子喷泉是新一代的频率基准.
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