求翻译：陈凡等（2006）考率了垄断市场条件下需求和成本均不确定下同时对开发时机和开发密度做出最优决策的房地产开发投资模型。是什么意思？

Fan Chen (2006) test rate under monopoly market conditions, demand and costs are not identified at the same time to make the best decisions on development timing and density real estate development and investment model.

Chen (2006) and where the rate under the conditions of monopoly needs and costs are not fixed for the next while the development time and development density make optimal decisions in real estate development and investment model.

Chen Fan and so on (2006) tested leads to monopolize under the market condition the demand and the cost indefinite under simultaneously to develops the opportunity and the development density makes the most superior policy-making the property development investment model.

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