bipolar junction transistor

例句：

1. 1.The bipolar junction transistor is a crucial component in the design of electronic circuits.
   双极结晶体管是电子电路设计中的关键组件。
2. 2. The bipolar junction transistor is widely used in power electronics and communication systems.
   双极结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 junction transistor has a high gain and low noise, making it an ideal choice for high-speed digital circuits.
   双极结晶体管具有高增益和低噪声，因此非常适合用于高速数字电路。