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21 小时
时间的终极刻度:秒的未来如何被重新定义?
从古埃及的日晷到现代的原子钟,人类对时间测量的精度不断提升。而如今,光学钟的精确度已超越了当前以铯-133原子跃迁定义的“秒”。这引发了一个关键问题:我们是否应该重新定义时间的基本单位?本文将系统解析当前时间计量的框架、光学钟的革命性突破,以及重新定 ...
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