octave
noun /ˈɒktɪv/
/ˈɑːktɪv/
(music- the difference (the interval) between the first and last notes in a series of eight notes on a scale
八度 - to play an octave higher
高八度演奏 - Orbison's vocal range spanned three octaves.
奥毕森的音域跨越三个八度。
词源Middle English (originally referring to a period of eight days beginning with the day of a Church festival): via Old French from Latin octava dies ‘eighth day’. - to play an octave higher