thermostat relay

例句：

1. 1. The thermostat relay controls the temperature in the house.
   恒温器继电器控制着家里的温度。
2. 2. The relay was a critical component of the thermostat system.
   继电器是恒温器系统的关键组成部分。
3. 3. The relay switches the power to the heating system when the temperature drops below a certain level.
   当温度下降到一定水平以下时，继电器会切换供暖系统的电源。