In this paper,the theory of public goods is applied to the analysis of the general economy of railway infrastructure and the divers ity of the economical property of different railways in our country.是什么意思_In this paper,the theory of public goods is applied to the analysis of the general economy of railway infrastructure and the divers ity of the economical property of different railways in our country.在线翻译_英语_读音_用法_例句