生态系统的

• Qualitative analysis of a class dimensional differential ecosystem
  一类三维微分生态系统的定性分析
• Wild fauna and flora are important integrants of ecosystem
  野生动植物是生态系统的重要组成部分。
• Effect of tending method on ecosystem of chinese fir plantation
  抚育方式对杉木人工林生态系统的影响
• The management of ecology system in rekejue township , jinyang county
  金阳县热柯觉乡生态系统的保护与管理
• Effects of site preparations on ecosystem of chinese fir plantations
  整地方式对杉木人工林生态系统的影响
• The globalization of nitrogen deposition : consequences for terrestrial ecosystems
  对于陆地生态系统的意义
• Countermeasures of improving desert ecological system in west china
  西部大开发中改善沙漠生态系统的对策思考
• Wetland ecosystems formation and its protection in yellow river delta
  黄河三角洲湿地生态系统的形成及其保护
• A research on reverse logistics development based on industrial ecosystem
  基于工业生态系统的逆向物流发展研究
• Hydro - physical properties of black soil in different type of eco - system
  不同黑土生态系统的土壤水分物理性质研究