Music was in four-part and acappella, though sometimes with simple instrumentation.
音乐是在4个部分和无伴奏合唱，尽管有时简单的仪器。
But there is one acappella group that sings its songs in a mix of English and Urdu.
但是有一个无伴奏合唱团唱的是英语和乌尔都语混合的歌。
A. systems, and acoustically harsh rooms make it essential to have a mixing engineer with acappella experience.
systems以及声音环境acoustically harsh rooms，它们决定了在阿卡贝拉比赛中配备一个混音工程师是非常关键的。
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