Then recuring to the technical economy method and mathematic method, we set up an improved NPV model which includes more variables such as the increase rate of product cost, the time delay of investment income, and so on.是什么意思_Then recuring to the technical economy method and mathematic method, we set up an improved NPV model which includes more variables such as the increase rate of product cost, the time delay of investment income, and so on.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句