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	pai-lous paiche paid paid (for) paid (off or up) paid back paid down paid for paid in paid into paid off paid off or up paid up paid-up addition paideia paideutics paidles Paige paigeite paigle paigles paik paiked paiking paiks

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。