Part four, the use of the concept of ecological monitoring of classroom teaching systems analysis, classroom instruction on the monitoring and control system structure, function and features.
第四部分，运用生态学理念对课堂教学监控系统进行分析，论述了课堂教学监控系统的结构、功能和特点。
The system paid more attention to the biological and ecological analysis for alien organism, and improved the advantage and dependability of risk assessment by using computer model.
本系统注重对外来有害生物生物学和生态学特性的分析，利用计算机模型，提高了风险评估的便利性和可靠性。
The third part mainly summarizes the reality of our forest resources ecological benefit law system compensation. Simultaneously, there is analysis on some questions which exists to the present system.
本文第三部分主要总结了我国森林资源生态效益补偿制度的现状，同时对现行制度中存在的一些问题进行了分析。
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