Suzanne-Claire Williams: "The Astronomical Clock in Prague's Old Town Square.

Suzanne-Claire Williams：“布拉格旧城广场的天文钟。

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Using water power and having all the functions of the armill ary sphere it was the first astronomical clock in the world.

以水为动力，集浑仪、浑象、报时装置于一体，是世界上最早的天文钟。

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The immensely complicated astronomical clock built by Richard of Wallingford, abbot of St Albans, was so complex it took eight years to run through its full cycle of calculations and was the most intricate machine ever built up to that point.

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His realization was that the solution wouldn't come from improved astronomical readings, as many thinkers believed, but from an extremely accurate clock that could tell the time of the home port while at sea.

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