amplifying element

例句：

1. 1. Theengineer used an amplifying element toincrease the volume of the audio signal.
   工程师使用了一个放大元件来提高音频信号的音量。
2. 2. In this circuit, the amplifying element is responsible for amplifying the electrical signals.
   在这个电路中，放大元件负责放大电信号。
3. 3. The amplifying element in the speaker is designedto amplify the sound waves and convertthem into electrical signals.
   扬声器中的放大元件设计用来放大声波并将其转换为电信号。