The earliest recorded weight-driven mechanical clock was built in 1283 in Bedfordshire in England.

有记载的最早的重量驱动机械钟是1283年在英国贝德福德郡建造的。

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Pendulum clocks showed the hours more exactly than earlier clocks, since the weight on the pendulum could be moved up or down to make the clock to go faster or slower.

摆钟比早期的钟记时准，因为摆上的重锤可以上下移动调整钟的快慢。

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Polar moment of inertia can be increased by adding weight at 3 and 9 o 'clock, using the largest comfortable grip size and replacing worn grips regularly.

增加惯性力矩的方法是在3点和9点间增加质量，或者使用大的舒适的手柄并经常更换磨坏的柄皮。

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Studies have shown that eating late at night, working night shifts, and jet lag all throw the food clock off, resulting in overeating and weight gain.

FORBES: Holiday Overindulgence Got You Down? Blame Your 'Food Clock'