【英语时差8,16】恒温器（下）

But the fact that the brass¹ reacts more to temperature than iron does enables the switch to open and close in response to temperature. As your house gets cold, the brass side contracts more than the iron pulling the strip toward the brass side. If the strip bends far enough, it touches an electrical contact, completing the circuit, and turning on the heater. As the house warms up, the brass expands, pushing the strip away from the electrical contact and shutting off the heat. Finding The Metal Strip Some thermostats² don’t use the two part metal strip. And if your’s is one of these, you probably have just such a strip somewhere else. Perhaps in your oven thermometer, your electric toaster, or the automatic choke on your car.

1 brass   

n.黄铜；黄铜器，铜管乐器

参考例句：

• Many of the workers play in the factory's brass band.许多工人都在工厂铜管乐队中演奏。
• Brass is formed by the fusion of copper and zinc.黄铜是通过铜和锌的熔合而成的。

2 thermostats   

n.恒温（调节）器( thermostat的名词复数 )

参考例句：

• This is the basic operating principle of many thermostats. 这是许多恒温箱的基本工作原理。 来自辞典例句
• Thermostats can be used to regulate the temperature of a room. 恒温器可用来调节室内温度。 来自辞典例句