Time series models的用法和樣例：
例句
- The course is an introduction to univariate and multivariate time series models.
本課程是對於單變數與多變數時間序列模型的一個介紹。 - The Chinese population time series models have been formulated, but the Shaanxi population time series model has not been researched into.
對全國人口總量時間序列模型，已進行了一定的研究，對陝西省人口總量時間序列模型尚未研究。
