Many papers also focused on qualitative models with simple returns and provided forecasting for the rates of return.

许多论文还注重研究简易回收的定性模型，并提供回收率的预测方法。

youdao

Many papers also focused on qualitative models with simple returns and provided forecasting for the rates of return.

许多论文还注重研究简易回收的定性模型，并提供回收率的预测方法。

youdao