In 1860, French economist Clement Juglar identified the presence of cycles 8 to 11 years long.

1860年，法国经济学家朱格拉确定克莱门特存在周期8至11岁长。

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In 1860, French economist Clement Juglar identified the presence of cycles 8 to 11 years long.

1860年，法国经济学家朱格拉确定克莱门特存在周期8至11岁长。

youdao