Circulation economic growth system is a complicated large scale system being composed of subsystems such as ecological environment, economy, society.

 
  • 摘要循環(huán)經(jīng)濟發(fā)展系統是一個(gè)由生態(tài)環(huán)境、經(jīng)濟、社會(huì )等子系統組成的復雜大系統。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan