影响耕地数量变化的因素错综复杂，用单一的回归分析法不易得到一个满意的模型。
The factors influencing the quantity of cultivated land are many and complex, so a satisfactory model is hard to make by adopting the common regression method.
影响耕地数量变化的因素错综复杂，用单一的回归分析法不易得到一个满意的模型。
The factors influencing the quantity of cultivated land are many and complex, so a satisfactory model is hard to make by adopting the common regression method.
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