一篇外文书籍，是介绍时间序列分析的。虽然是外文的，但我觉的中文版本太不尽人意了。有时候翻一翻外文的解释，更好理解-A foreign language books, is the introduction of time series analysis. Although a foreign language, but I think the Chinese version of the unsatisfactory too. Sometimes double the interpretatio