plain.song
n.Roman Catholic Church （名词）【罗马天主教】
A Gregorian chant.格列高利圣歌A melody to which contrapuntal voices are added in Gregorian chant.素歌：加入对位音调的格列高利圣歌的曲子Any medieval liturgical music without strict meter and traditionally sung without accompaniment.Also called In this sense, also called plainchant 平旋律圣歌：中世纪礼拜仪式音乐，毫无强音装饰且通常没有伴奏也作 在此意义上也可称作 plainchant
来源：Translation of Medieval Latin cantus pl3nus 中世纪拉丁语 cantus pl3nus的翻译
