Besides, the Gradient of determinant manifests the influence of elements entering the model to the benefit of control is minor and their influence tendency is diminishing.
同时，从拟和优度来看，进入模型的因子对控制权收益的影响较小，而且呈现出逐步变小的趋势。
Besides, the Gradient of determinant manifests the influence of elements entering the model to the benefit of control is minor and their influence tendency is diminishing.
同时，从拟和优度来看，进入模型的因子对控制权收益的影响较小，而且呈现出逐步变小的趋势。
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