求翻译：蔡晓钰等（2006）对房地产投资的实物期权理论研究文献从增量房和存量房两大层次进行了梳理，并针对目前研究的局限性对相关研究方向作了展望。是什么意思？

Cai Xiao Yu (2006) on real estate investment, real options theory literature from the two-level incremental room and stock room, carding, and prospected for the limitations of the current study related research.

Cai Xiao Yu, and others (2006) in the real estate investment options in kind of the research literature from an incremental theory room and storage room for the two major levels combing, and the limitations in the current study of related research direction for the future.

Cai Xiaoyu and so on (2006) pair of real estate investment real options fundamental research literature carried on from the increase room and the storage quantity room two big levels has combed, and aimed at the limitation which at present studies to the correlation research direction to make the fo

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正在翻译，请等待...