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	polyaxons polyazo polybasite polybasites Polybius polyblend polybori polyborine Polyborus polyboruses polyborusses polybotriae polybotrias polybotryae polybotryas polybrid polybrids polybrominated biphenyl polybutadiene polybutadienes polybutene polybutenes polybutylene polybutylenes Polycaon

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。