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第四次科技革命（21世纪之交----） 1.基础：数字革命 2.表现：大数据、人工智能、云计算为代表 (jan 1, 2000 – jan 1, 2100)

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17 Jan 2021
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jan 1, 2000
jan 1, 2100
~ 100 years
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