请高手帮吗个翻译一下，谢谢

Large units and small units includes the relationship between efficiency and fairness of the community's choice. The contradiction between the two has to a certain extent the enterprise to measure and maximize the benefits from social welfare maximization. To developers for high-income groups profit more abundant large units, especially in the more favorable site location, construction, large size is more like the optimal allocation of resources. However, there is no doubt that the construction of large size means that the same land area to meet the needs of the home less, a large number of small units aimed at low-income people in the room can only be disappointed.