例句 /

At first, there is fundamental theory, which explains market failures, public goods, externalities and pubic choice.

At first, there is fundamental theory, which explains market failures, public goods, externalities and pubic choice.

第一,基本理论,阐述财政学的研究对象、范围,政府政策的评估标准以及实现政策目标的基本方法。