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世界協定時
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世界協定時
shì jiè xié dìng shí
由于地球自转速度会越来越慢,故须以利用铯原子振荡周期算出的「原小时」来修正误差,作为世人使用的标准时间,称为「世界协定时」。目前由设在法国巴黎的国际地球自转中央局发布。
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更新时间:2026/8/9 4:31:23