短語(yǔ)詞組短語(yǔ)undamped electrical oscillation 無(wú)阻尼電振蕩undamped d oscillation 無(wú)衰減振蕩undamped period of oscillation 等幅振蕩周期oscillation undamped 不減幅振蕩 返回 undamped oscillation