pair transistor

例句：

1. 1. This pair of transistors is used to control the speed of a motor.
   这对晶体管用于控制电机的速度。
2. 2. The pair of transistors was designed for high-performance applications.
   这对晶体管是为高性能应用设计的。
3. 3. The pair of transistors has been tested and proven to be reliable.
   这对晶体管已经经过测试并证明是可靠的。