twenty-one英 [ˈtwenti wʌn]美 [ˈtwenti wʌn]n. 二十一,二十一个所成之一组高考英英释义nouna gambling game using cardsSynonym:blackjackvingt-et-unthe cardinal number that is the sum of twenty and oneSynonym:21XXIadjbeing one more than twentySynonym:21xxi双语例句