和弦，Cdim的构成音是1 b3 b5中间都是小三度·还有就是减七和弦 构成音是1 b3 b5 6 ，注意最后的一个音可以理解为bb7，它们每个音的音程关系就是个小三度。
减三和弦和增三和弦传统上被看作不协和和弦。
Diminished triads and augmented triads are traditionally regarded as dissonant chords.
减三和弦是根音上加一个小三度的三音和弦，其上加一个小三度。
A diminished triad is a three-note chord with a minor third added over the root and a minor third added above that.
根据最低音与中间音之间，中间音与最高音之间的第三音的性质，三和弦可分为大，小，增或减。
Triads may be major, minor, augmented or diminished according to the quality of the thirds between the bottom and middle note, and between the middle note and the top note of the three.
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