成本预测的基本作用是保证以最少的资金耗费，获得最大的经济效益。

The basic function of forecasting the cost of goods manufactured is to obtain the maximum economic benefits on the condition of minimum expense bankroll.

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在广泛采用新技术和新方法的同时，积极变革油田开发管理模式，以求获得最大的经济效益。

While widely using the new technology and new method, the company positively transforms the oil-field development management pattern, in order to obtain the maximum economic efficiency.

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这给传统灌溉提出了新的挑战，即不但要获得灌溉面积上的最大产量，而且要获得最大的经济效益。

This puts forward a new challenge to traditional irrigation. Not only getting high yield in per irrigation area, but also getting the most economic benefit.

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