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A1, time
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A1, time
【天文学】原子时标(1 秒钟等于铯原子在零场中周期运动 9,192,631,770次)
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up quarks
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upraising
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uprated
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uprear
upreared
upright
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upright piano
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更新时间:2025/5/12 13:48:01