单词	back focus
释义	back focus noun : the distance from the rear glass surface of a photographic lens to the focal plane when the lens is focused on a very distant object Word History First Known Use 1868, in the meaning defined above
随便看	epigraphs epigraphy epigyna epigyne epigynes epigynies epigynous epigynum epigynums epigyny Epihippus epiianthinite epikeia epikeratophakiae epikeratophakias epikleses epiklesis epilabra epilabrum Epilachna epilachnae epilachnas epilated epilates epilating

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。