英语词汇principal focus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	principal focus
释义	principal focus 【物理学】主焦点[亦作 focal point]
随便看	hairpiece hairpieces hair pies hairpin hairpinned hairpinning hairpins hair-raiser hair-raisers hair-raising hair-raisingly hair restorer hairs hairsbreadth hairsbreadths hair seal hair seals hair sheep hair shirt hair-shirt hairshirt hair shirts hair slide hair slides hair space

英汉双解词典包含483723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。