Land rent model of Marx needs to be resurveyed once some factors changes, such as comparatively low organic composition of agricultural capital, property rights of land on the move and so on.
资本有机构成和地权流转等因素一旦发生变化，马克思农业地租模型的结论就需要重新审视。
The company completed the dynamic chemical simulation model base on Prof. Chen's leadership, and developed the computer simulation training software has its own intellectual property rights.
公司在陈教授的带领下完成了动态化工仿真模型库，并开发形成了自有知识产权的计算机仿真培训软件。
METHOD: The legal features of intellectual property rights protection for Chinese traditional medicine were analyzed and its economic value was evaluated with economic model.
方法：分析我国中药知识产权保护的法律特点，采用模型方法评估其经济性。
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