Only some parameters such as theoretical A/F ratio and modified coefficients of sub models needed to modify little, when simulating the characteristics of engine using different gas.
当燃用不同的燃气时，只需对其中的一些参量（如理论空燃比等）及子模型的修正系数进行微调即可。
CONCLUSIONS: Characteristics that distinguish elderly from younger HCC patients include lower M/F ratio, worse performance status, lower rate of HCV infection, and less advanced underlying cirrhosis.
结论：年长组区别于年轻组HCC患者的特征包括较低的M/F比率、更差的体力状态、较低的HCV感染率以及较少进展的肝硬化。
CONCLUSIONS: Characteristics that distinguish elderly from younger HCC patients include lower M/F ratio, worse performance status, lower rate of HCV infection, and less advanced underlying cirrhosis.
结论：年长组区别于年轻组HCC患者的特征包括较低的M/F比率、更差的体力状态、较低的HCV感染率以及较少进展的肝硬化。
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