世界在本质上是非线性的。
试想，要真实地反映出这些非线性时间序列的本质，就必须使用非线性工具。
It must need nonlinear method to reflect essence of the time series veritably.
社会经济系统的非线性本质决定了必须建立非线性模型进行预测。
Society economic system nonlinearity nature decides the way of building nonlinear model to forecast.
社会经济系统的非线性本质决定了必须建立非线性模型进行预测。
Society economic system nonlinearity nature decides the way of building nonlinear model to forecast.
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