Whenwementionpoliticaleconomyinacountry,usuallywerefertoitspolitical,marketandlegalsystems.Thethreesystemsareinterdependent,interactandinfluencetoeachother.

(答案分析： not market but economic. When we mention political economy in a country, usually we refer to its political, economic and legal systems. The three systems are interdependent, interact and influence to each other.)