In this paper, a null means stationary series is reached which matched ARMA model after removing the long?term tendency, cyclical fluctuating and seasonal fluctuating one by one from Baltic Freight Index.是什么意思_In this paper, a null means stationary series is reached which matched ARMA model after removing the long?term tendency, cyclical fluctuating and seasonal fluctuating one by one from Baltic Freight Index.在线翻译_英语_读音_用法_例句