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 lengthBrE /ˌfəʊkl ˈleŋθ/NAmE /ˌfoʊkl ˈleŋθ/ noun (physics 物理) the distance between the centre of a mirror or a lens and its focus 焦距
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