The graph below for example shows the average width of the waist and the Kondratieff wave for the US from 1791-1936.

下例图表展示的就是：从1791至1936年美国女性的平均腰宽与Kondratieff波动。

youdao

While I think you probably lost most readers with kondratieff wave- I had to revisit myself to recall duration, the relationship between technology and culture is very interesting.

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The years between 1990 and 2040 can be described as a new Kondratieff long wave.

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