高歌一曲: sing a song loudly; raise one's voice to sing a song; chant a melody
纵情: to one's heart's content; as much as one likes 短语和例子纵情歌唱 sing heartily; 纵情诗酒 give one's mind to poems and grant indulgence to wine; 纵情游乐 be on the spree
纵情欢乐: be on the loose or on the spree; have one's fling; revel to one's heart's content