... group index ==> 群屈折率,分组指数,群折射率 group index number ==> 分类指数 group indication ==> 分类标志,组号,组指示 ...
2
?分组指数
... group index : 分组指数，类指数 group index number : 分组指数，分类指数 series of index numbers : 指数数列 ...
双语例句
1
Transparency International this week released its yearly Corruption Perceptions Index. The Berlin-based group rates 176 countries and territories with a number from zero to 100.