Wednesday's extra second will bring the world's high-tech atomic clocks back into sync with time as defined by Earth's rotation.

经过周三闰秒之后，全世界的高技术原子钟将再次与地球自转保持同步。

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In this paper, the symmetry analysis method is used to compute and analyse the rotation inertia, polarizability, selection rule in mechanics, electricity, atomic and molecular spectroscopy.

本文用对称分析方法，分析计算了力学、电学、固体物理学、原子和分子光谱学中的转动惯量、极化率、选择定则等。

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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