| 释义 |
1 ?焦比 不单是这原因, 还要降低焦比(F-ratio), 如SCT用6.3减焦镜, 焦比由10变为6.3, 那原本要曝光两分半钟才见得到的天体, 现在曝光不足1分钟便可见得到。
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For example, the focal length of an 8" (203.2mm) aperture with a focal ratio of f/10 would be 203.2 x 10 = 2032mm. 比如，孔径为8英寸(203.2mm)，焦比为f/10的透镜，其焦距为203.2 x 10 = 2032mm。 - 2
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。 - 3
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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