關(guān)于簡(jiǎn)并振動(dòng)的數(shù)目的問(wèn)題,還需要做進(jìn)一步的研究.As to the number of degenerate vibrations some further considerations are necessary.在共振時(shí),阻尼可能限制穩(wěn)定振動(dòng)的振幅.Damping wakes possible finite steady - state vibration amplitude at resonance.管樂(lè)器的聲音是由振動(dòng)的氣柱產(chǎn)生...