This paper suggests Gray combined Model should be used in estimating the Engine Development Cost so as to solve the problem mentioned above.
为解决这一问题，研究了灰色组合模型在发动机研制费用估算中的应用。
This paper suggests Gray combined Model should be used in estimating the Engine Development Cost so as to solve the problem mentioned above.
为解决这一问题，研究了灰色组合模型在发动机研制费用估算中的应用。
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