piston transmitter的用法和樣例：
例句
- A cellphone is a miniaturized radio receiver and transmitter, and the health concerns focus on the radio waves it gives off.
手機電話是袖珍的無線電接收器和傳送器而且人們對健康的關注集中在它所釋放的無線電波。 - These electric currents, caused by the received radio waves, are equal to the currents that originally generated the radio waves in the antenna of the transmitter.
因收到無線電波而引起的這些電流等於在傳送器的天線起初產生的無線電波的電流。
