英语词汇focal length怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	focal length
释义	focal lengthn.（名词）abbr. f, FL【缩写】 The distance from the surface of a lens or mirror to its focal point. Also called focal distance ,focus 焦距：从透镜或面镜的表面到焦点的距离也作 focal distance,focus
随便看	relativistic relativists relativities relativity relator relator relators relax relax relaxant relaxants relaxation relaxations relaxation time relaxed relaxed relaxer relaxers relaxes relaxin relaxing relaxins relay relay re-lay

英汉双解词典包含166908条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。