bipolar transistor

例句：

1. 1.The bipolar transistor is a crucial component in electronic circuits.
   双极晶体管是电子电路中的关键元件。
2. 2.The bipolar transistor has been widely used in power electronics and communication systems.
   双极晶体管在电力电子和通信系统中得到了广泛应用。
3. 3. The bipolar transistor is responsible for amplifying the signal and converting it into an electrical output.
   双极晶体管负责放大信号并将其转换为电输出。