英语翻译The musical sampler sent into outer space with the Voyag

英语翻译The musical sampler sent into outer space with the Voyager spacecraft in 1977 featured 27 tracks,only 10 of them from Western composers,including not only Bach,Mozart and Beethoven but also Louis Armstrong,Chuck Berry and Blind Willie Johnson.其中,主要是第一句话中的 featured 27 tracks应该如何理解呢?该句应该如何翻译妥当呢?