focal ratio

同根派生

The baker Super-Schmidt camera can operate with extremely low focal ratios.
Baker超施密特照相機(jī)則能以非常低的焦比工作。
If you notice, every manufacturer of quality scopes with fast focal ratios uses mirror diagonals.
如果你注意一些，沒一個(gè)生產(chǎn)高質(zhì)量短焦比的廠家，都會(huì)使用反射結(jié)構(gòu)的天頂；
In the situation of different energy input, models are calculated.The thermoelectric generating parameters are obtained with the changes of focalizing ratio.
并對不同輸入能量的情況進(jìn)行了計(jì)算，得出了熱電性能參數(shù)隨聚光比的變化規(guī)律。
The focal point of our discussion was the need for action.
我們討論的中心是采取行動(dòng)的必要性。
The ratio of students to teachers is 35:1.
學(xué)生和老師的比率是三十五比一。