pitch cycle of vibration的用法和樣例：
例句
- A vibration period tends to decrease or remain constant as energy is lost, as is the case for a pendulum.
在損失能量時，振動周期傾向於減小或保持不變，如同單擺那樣。 - The vibration states with different thermoelastic coefficients are compared and the effect of thermoelastic coupling on the amplitude and frequency is presented.
比較了不同熱彈耦合參數對應的振動情況，得出了熱彈耦合效應對振動周期和頻率的影響。
