| 1. | The intervals of a fourth , fifth and octave in the diatonic scale are described as perfect intervals , as are the wider intervals above the octave , such as the eleventh or twelfth , other wise known as the compound perfect fourth and compound perfect fifth
自然音阶的四度、五度和八度音程为纯音程，高于八度的更大音程诸如十一或十二音程称为复合纯四度和复合纯五度。 |
