引力模型提供了一个实验性的、易于掌握的、一般均衡的框架。

The gravity model has offered the frame of a general equilibrium, experimental, easy to grasp.

youdao

引力模型提供了一个实验性的、易于掌握的、一般均衡的框架。

The gravity model has offered the frame of a general equilibrium, experimental, easy to grasp.

youdao