harmonic displacement series谐波系
Harmonic tone series谐音列
harmonic c series调和级数
harmonic displacement series of sound谐音系列
harmonische reihe harmonic series低级数
harmonic series of sounds谐音系列;翻译
The Harmonic Series和谐级数
ellipsoidal harmonic series椭球谐级数
alternating harmonic series莱布尼兹级数;[数] 交错调和级数
N(名词) a series whose terms are in harmonic progression, as in 1 + + + … 调和级数 [maths]