八度

Her voice went down an octave.

她的嗓音下降了八度。

European music happens to use a scale of eight notes, hence the use of the term octave.

欧洲音乐凑巧采用了八音音阶，“八度”一词就由此而来。

If the note of D is sounded on a harp, all the corresponding D strings of other octaves will likewise resonate.

如果用竖琴演奏D音符，其他八度音阶所有相应的D弦都将发出共鸣。

Yesterday s high was ninety eight degrees.

昨天的最高温度是九十八度。

These notes are an octave apart.

这些音相距八度。