To enumerate. To assign, in order, the positive integers 1,2,3,… to finitely (or denumerably) many elements of a set.
A synonym for frequency.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。