| 单词 | extension ring |
| 释义 | extension ringextension tubenounphotog a spacer element that can be fixed between the camera body and the lens to increase the distance between film and lens and allow closer focus than would be possible without it Words nearby extension ringextension cord, extension courses, extension field, extension ladder, extension library service, extension ring, extension rule, extension tube, extensity, extensive, extensometer 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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