quaternaries

汉语翻译

词型变化：

英语解释：

名词 quaternary:

1. last 2 million years
   同义词：Quaternary, Quaternary period, Age of Man
2. the cardinal number that is the sum of three and one
   同义词：four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe