A number of cities in the south had an acid rain frequency exceeding 80%.
许多南方城市的酸雨频率已经超过了80%。
Probe into Ningde city fall acid rain frequency and relation of season in the rain.
探讨宁德市降雨中酸雨频率与季节变化的关系。
We usually use the traditional remnant GM (1, 1) model to forecast the acid rain frequency.
目前预测酸雨频率多采用传统的残差gm(1,1)模型。
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