The three groups of study participants included individuals with no musical training; with one to nine years of musical study; or with at least 10 years of musical training.

研究分为三个组：组一、没有受过音乐训练。组二、有1 - 9年的音乐经验。

youdao

This main heading within the Subject Index contains groups of electroacoustic works that can be claimed to form a musical genre or category by content, means, aesthetic or listening context.

这个主标题下的主题词囊括了众多的电子音乐作品。以美学与听觉感受为前提，就其作品的内容而言，可以说它们已经确立了一种音乐风格或流派。

youdao

As a college professor, I face rooms of identically clad students who all watch the same sitcoms, have all seen that month's two or three mass-produced Hollywood films and all listen to the same six indistinguishable musical groups on the two local commercial radio stations.

ECONOMIST: Unnatural selection