- [countable + singular or plural verb]
a group of three people or things 三人小组；三件一套；三合一 A trio of English runners featured in the women’s 1 500 metres. 三名英国选手参加了女子1 500米比赛。
- [countable + singular or plural verb]
a group of three musicians or singers who play or sing together 三重奏乐团；三重唱组合 - [countable]
a piece of music for three musicians or singers 三重奏（曲）；三重唱（曲） a trio for piano, oboe and bassoon 钢琴、双簧管及大管三重奏
Word Originearly 18th cent.: from Italian, from Latin tres ‘three’, on the pattern of duo.