1580s, "song for two voices," via either Italian or French, from Latin duo "two" (see two). Meaning "two people" (especially as an entertainment team) attested by 1887.
权威例句
1. The duo set up a scam to settle their respective debts.
那对搭档设了一计以消除各自的债务。
2. the comedy duo Laurel and Hardy
劳莱和哈代这对喜剧搭档
3. 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组.
4. Ah Duo bit his lips to keep from laughing aloud.