短語(yǔ)詞組短語(yǔ)undamped period of oscillation 等幅振蕩周期period of free oscillation 自由振蕩周期;自由振蕩的周期英語(yǔ)period of an oscillation 振動(dòng)的周期natural period of oscillation 固有振動(dòng)周期nataral period of oscillation 固有振蕩周期critical period of the oscillation 臨界振蕩周期period of the damped oscillation 阻尼振蕩周期 返回 period of oscillation