英语词汇refractive index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	refractive index
释义	refractive indexn. the ratio of the velocity of light in a vacuum to its velocity in a specified medium 折射率(光线在真空中传播速度与在某特定媒介中传播速度的比率)
随便看	set little by set menu set much by set-off set off seton set one's cap at (or US [美] for) set oneself up as set one's face against set one's face against set one's hand to set one's heart (or hopes) on set one's seal to (or on) set one's sights on set one's teeth set one's wits to set on foot set on (or upon) set (or lay or put) store by (or on) setose set out set phrase set piece set point set sail

英汉双解词典包含94788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。