bipolar switch

例句：

1. 1.The bipolar switch is responsible for controlling the flow of electricity.
   双极开关负责控制电流的流动。
2. 2. In a bipolar switch, the two terminals are connected in series.
   在双极开关中，两个端子串联连接。
3. 3. The bipolar switch is used to switch between two circuits.
   双极开关用于在两个电路之间切换。