例句與造句

1. Imagining the key of C major, suppose we insist that the subdominant root F and dominant root G be a fifth ( 3 : 2 ) away from the tonic root C on either side, and that the chords FAC, CEG, and GBD be just major triads ( with frequency ratios 4 : 5 : 6 ):
2. It's difficult to find root fs in a sentence. 用root fs造句挺難的