N-COUNT-COLL
三人组合;（尤指）三重唱;三个一组;三件一套
A trio is a group of three people together, especially musicians or singers, or a group of three things that have something in common.
例句
…classy American songs from a Texas trio…
由来自得克萨斯三人组合演唱的动听美国歌曲
The trio are part of Sotheby's sale of Works of Art.
该三件套是苏富比艺术品拍卖会上的一件拍品。