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急!请帮忙翻译以下句子!1.A weight-driven clock was used in about 1309 i

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急!
请帮忙翻译以下句子!
1.A weight-driven clock was used in about 1309 in a church in Milan.
2. People used spring-driven clocks in the late 15th century.
3. Clocks conuted seconds for the first time in the late 17th century. Before that, they did't even count minutes.
急!请帮忙翻译以下句子!1.A weight-driven clock was used in about 1309 i
1.1309年首个以重力作为驱动(这个weight-driven我不确定)的钟在米兰的教堂内投入使用.
2.15世纪末期人们开始使用发条驱动的钟.
3.首次能精确到秒的时钟在17世纪晚期出现.在那之前,时钟甚至无法精确到分钟.