noun 下载 🔗分享 四音列，四音音组 Any set of four different pitch classes. Examples : "The music teacher showed the students a tetrachord, demonstrating how four different notes can create a simple melody. " 音乐老师向学生们展示了一个四音列，演示了四个不同的音如何构成一段简单的旋律。 music 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 四音列，四音音阶 A series of four sounds, forming a scale of two-and-a-half tones. Examples : "The music teacher explained that a tetrachord forms the basis of many scales. " 音乐老师解释说，四音列（四音音阶）是许多音阶的基础。 music sound 与AI对话词汇游戏阅读练习
