tetrode transistor

例句：

1. 1. This device is a type of transistor used in electronics.
   这种设备是电子学中使用的一种晶体管。
2. 2. The transistor was the first electronic component to be mass-produced.
   晶体管是第一个大规模生产的电子元件。
3. 3. The transistor is responsible for controlling the flow of electricity through the circuit.
   晶体管负责控制电流通过电路的流动。