冪零群類 nilpotent class: 冪零類generalized nilpotent class: 廣義冪零類nilpotent: 冪零的; 冪零元groups: 六人(集體); 帳戶群組; 組合groups of: 成群的……下載手機(jī)詞典可隨時隨地查詞查翻譯