| 单词 | equivalent focal length |
| 释义 | equivalent focal lengthnounoptics the ratio of the size of an image of a small distant object near the optical axis to the angular distance of the object in radians Words nearby equivalent focal lengthequivalence relation, equivalency, equivalent, equivalent air speed, equivalent circuit, equivalent focal length, equivalent weight, equivalve, equivocal, equivocally, equivocate Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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