A "normal year," of course, is not something that either Charlie Munger, Vice Chairman of Berkshire and my partner, or I can define with anything like precision.
当然，“正常年份”是查理·蒙格(波克夏的副董事长和我的合伙人)和我本人都很难精确定义的东西。
For gray model, the longer of original datum, the higher precision during smoothing processing of datum and the lower precision during natural logarithm processing of datum, vice versa;
就灰色预测而言，如果原始数据列较长，对原始数据进行平滑处理所得预测模型精度较高，而对原始数据进行取自然对数的处理所得模型预测精度较低；
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