an operation that segregates items into groups according to a specified criterion
同义词：sort
the basic cognitive process of arranging into classes or categories
同义词：classification??/??categorization??/??categorisation
grouping by class or kind or size
英汉双解词典包含3185865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。