如果在一根振动弦的中部轻轻一触，它就发出高八度的音。
If a vibrating string is lightly touched at its midpoint, its pitch goes up an octave.
高音调的，高八度的高音谱表上方第一个八度的；高音调的。
几乎所有的音乐体系都是基于所跨越的八度音阶范围——这一音符的发音同开始时的完全一样，只是音高或高或低。
Almost all musical systems are based on scales spanning an octave-the note that sounds the same as the one you started off with, but at a higher or lower pitch.
某些昆虫比人类能听高两个八度以上的超音速声音。
Some insects hear ultrasonic sounds more than two octaves higher than humans can.
某些昆虫比人类能听高两个八度以上的超音速声音。
Some insects hear ultrasonic sounds more than two octaves higher than humans can.
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