But the difference is the time scale.

但是不同的是时间段。

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The former will take time to scale to make a huge difference day-to-day, and the latter is clearly the most speculative (a subject for another day).

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Over a few decades this would amount to a minute's difference, but over several hundred years this would mean the atomic clock time-scale and the time-scale based on the Earth's rotation would be out by an hour.

BBC: Changes to the world's time scale debated