Title: Ni de qian ni
Description: Ben shu cong jing ji xue zhong de"shu zi"ru shou, Bi ru GDP, Ji ni xi shu deng deng, Hua ti cong zhei xie guan xi guo ji min sheng, Tie jin bai xing sheng huo de shu zi kai shi, Jie shao zhei shu zi, Zhi shu, Chang shu de yuan yuan deng de zuo yong, Wo guo mu qian suo chu de shui ping yi ji he lao bai xing de guan xi.
Subjects: Jing ji xue, Tong su du wu