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外部不确定因素主要指环境因素和宏观经济环境因素,如利率和汇率的波动及通货膨胀等。项目成本控制因基于使项目成本发生变化的外部不确定因素进行相应的控制。
External uncertainties mainly refer to environmental factors and macroeconomic environmental factors such as fluctuations in interest rates and exchange rates and inflation. Project cost control is controlled based on external uncertainties that change the project cost.