Sextet for two Violins, two Violas and two Cellos No. 1 in B-flat major, Op. 18: I. Allegro ma non troppo-Juilliard String Quartet - 腾讯音乐娱乐-千万正版音乐海量无损曲库新歌热歌天天畅听的高品质音乐平台！