The economic returns of the above four projects is analyzed in the paper,which shows that all the projects can make profits and the Internal Rate of Return(IRR) of methanol plant is the highest.是什么意思_The economic returns of the above four projects is analyzed in the paper,which shows that all the projects can make profits and the Internal Rate of Return(IRR) of methanol plant is the highest.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句