概述了草地生态系统碳素循环的一般特征，介绍了一个草地碳循环的分室模型；

Some major characteristics of the carbon cycle in grassland ecosystems were summarized, and a carbon cycle compartment model was introduced as well;

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系统仿真模型具有“战略实验室”的美誉及功能，在论文的第五部分里，给出了如何通过政策参数变动来调控系统的案例和做法。

Emulational system model has a good name "Strategical Laboratory", how to regulate the system by altering the parameters of policies is presented in the fifth part of this paper.

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系统仿真模型具有“战略实验室”的美誉及功能，在论文的第五部分里，给出了如何通过政策参数变动来调控系统的案例和做法。

Emulational system model has a good name "Strategical Laboratory", how to regulate the system by altering the parameters of policies is presented in the fifth part of this paper.

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