In this paper, we have given some classes of groups that are not sets, such as the classes of torsion abelian groups, abelian groups, torsion-free non-abelian groups, non-abelian groups.是什么意思_In this paper, we have given some classes of groups that are not sets, such as the classes of torsion abelian groups, abelian groups, torsion-free non-abelian groups, non-abelian groups.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句