damped alternating current

例句：

1. 1.The damped oscillator produces a sine wave.
   减振振荡器产生正弦波。
2. 2. The damped spring absorbs the impact of the ball.
   减振弹簧吸收了球的冲击。
3. 3. The damped system is designed to reduce noise.
   减振系统旨在减少噪音。