n.成对的表演者；二重奏（唱）
pref.表示“二”；“一对”
The duo were a real hit in last year's show. 这一对搭档在去年的演出中大出风头。
The Chinese duo collected a winning total of 469.08 points in the six-dive final. 这对中国组合在决赛第六跳中以总分469.
The violinist walked on the stage and the duo became a trio. 那位小提琴家走上台,二重奏变成了三重奏。
