英语词汇“grade index”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	grade index
释义	grade index freq. 4 dict. 2 [网络]折射率渐变型；渐变折射率；阶级索引
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英汉翻译词典包含4368284条英汉汉英翻译词条，基本涵盖了全部常用英语单词及常用语的翻译及用法，是英语学习的有利工具。