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折射率 /zhéshèlǜ/ meaning in English

ChineseEnglish
折射率 /zhéshèlǜ/ noun

refractive index [refractive indices](ratio of the speed of light in vacuum to another medium)
noun
[UK: rɪ.ˈfræk.tɪv ˈɪn.deks] [US: rə.ˈfræk.tɪv ˈɪn.deks]