“equivalent focal length”的概念、定义、翻译、参考文献-科学参考

单词	equivalent focal length
释义	equivalent focal length Astronomy The focal length of an optical system expressed as if it consisted of a single optical element. It is used to describe the focal length of an enclosed optical system, such as an eyepiece, which has no position from which the focal distance can be measured.
随便看	exception handling excess-3 code excess air excess burden excess capacity excess demand excess electron excess factor excess flow valve excess-n notation excess profit excess reactants exchange exchangeability exchangeable exchangeable disk store exchangeable ions exchange capacity exchange control Exchange Equalization Account exchange force exchange forces exchange paradox exchange pool exchange rate

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