light-sensitive relay

例句：

1. 1.The light-sensitive relay is used to detect changes in the light level.
   光敏感继电器用于检测光线水平的变化。
2. 2. In this circuit, the light-sensitive relay is activated by the sensor.
   在这个电路中，光敏感继电器由传感器激活。
3. 3. The design of the light-sensitive relay is crucial for the system's reliability.
   光敏感继电器的设计对于系统的可靠性至关重要。