duo
/ˈdjuːəʊ/noun
(pl. -os)
1
- a pair of people or things, especially in music or entertainment（尤指音乐或娱乐表演中的）一对, 一双（人或物）：
the comedy duo Laurel and Hardy
喜剧搭档劳雷尔和哈代
United's goalscoring duo.
曼联队的一对进球组合。
2
- Music a duet【乐】二重唱（曲）; 二重奏（曲）：
he wrote two duos for violin and viola.
他写了两部小提琴和中提琴的二重奏曲。
词源
late 16th cent. (in sense 2)： via Italian from Latin duo 'two'.