求翻译：比如客观地评价房地产开发投资项目的经济效果或对不同投资方案进行经济比较时，不仅要考虑支出和收入的数额，还必须考虑每笔现金流量发生的时间，以某一个相同的时点为基准，把不同时点上的支出和收入折算到同一个时点上，才能得出正确的结论。是什么意思？

Example, an objective evaluation of the economic effects of the real estate development and investment projects and economic comparison of different investment programs, not only to take into account the amount of expenditure and income, you must also consider the time of each cash flow, as the benc

For example an objective evaluation of the real estate development and investment projects in different economic effects or investment program for economic comparison, not only to consider the expenditure and income level, you must also take into account each time by the cash flow to the same point

For instance appraises the property development investment plan objectively the economic effect or when carries on the economical comparison to the different investment plan, not only must consider the income and expenditure the amount, but also must consider each cash current capacity occurs the ti

Such as an objective evaluation of economic effect of investment in real estate development projects or economic comparisons of different investment programmes, not only taking into account the level of expenditure and income, must also consider the time of each cash flow occurs, one to the same poi

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