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倍频程
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octave
倍频程
任何两个频率之间比值为2∶1的音高间距。又称八度音。
Physics
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octave
倍频程
octave
①八音度 ②倍频程
Mathematics
octave
八元数;倍频程
Astronomy
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Poncelet coaxal theorem
Poncelet continuity principle
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Poncelet-Steiner construction
Poncelet-Steiner theorem
Poncelet theorem
Poncelet transform
Poncelet transverse
pond
pond aquaculture
pond aquaculture composite constructed wetland
pond aquaculture environment
pond aquaculture facilities
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pond bio-floating bed
pond community
pond culture of crustaceans
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ponderability
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