中文说明：改进的灰色预测模型，简单实用，可用于经济预测及其他预测问题预测精度高
English Description：
The improved grey prediction model is simple and practical, and can be used for economic prediction and other forecasting problems with high prediction accuracy
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中文说明：改进的灰色预测模型，简单实用，可用于经济预测及其他预测问题预测精度高
English Description：
The improved grey prediction model is simple and practical, and can be used for economic prediction and other forecasting problems with high prediction accuracy