问题描述：
音乐理论知识(英语翻译)
1.Chords are built off of a single note, called the root.
2.In this lesson, we will be discussing triads.
机翻走开!走开!
1.Chords are built off of a single note, called the root.
2.In this lesson, we will be discussing triads.
机翻走开!走开!
问题解答：
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