According to the model between the engine and the transmission, we draw up a computer program imitating the automobile motive power property and the automobile fuel economic property.
在建立汽车发动机和传动系数学模型的基础上，编写了模拟汽车动力性和燃油经济性的计算机程序。
As a substitute for diesel, the property and economic efficiency of fuel alcohol have been approved.
作为替代柴油的燃料乙醇，其性能和经济性早已得到认可。
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