By the eighteenth century, people had developed mechanical clocks and watches. And today, many of our clocks and watches are electronic.

直到十八世纪，人们发明了机械钟和表，今天我们很多人使用的是电子表。

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By the end of the 13th century, Italian engineers were building large mechanical clocks inside towers, driven by slowly descending weights.

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In the Thirteenth Century the first mechanical clocks began to appear across Europe, a Medieval innovation that would revolutionise how humans saw time.

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