When the head begins to heat up, yawning acts as a natural "thermostat" by allowing cool air to rush in and bring the brain back down to a healthy temperature, research suggests.

科学家研究发现，当人的大脑开始出现过热时，打呵欠的动作就充当天然的“自动调温器”，让清凉的空气进入大脑，使大脑温度恢复到健康水平。

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The timer worked like a thermostat, on the principle that two different kinds of metal will expand and contract at different rates when their temperature changes.

计时器的工作原理类似于恒温器，当温度变化时，两种不同金属以不同速率缩小或膨胀。

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When was the last time you were browsing the aisles at Thermostats 'R Us or ThermoMart and thought, "man, that thermostat looks so great I just want it in my home, regulating its temperature"?

“嘿，那个恒温器看起来很棒，我想来一台，它能自己调节温度吗”？

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It works by a control mechanism called negative feedback, and the thermostat is measuring the temperature and then sending a signal to a heater somewhere.

是通过一种叫做负反馈的控制机制,探测器测量温度,再把信号传给加热器

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Maybe you don't control thermostats in your dorm room, some of you do and some of you don't probably, and maybe it doesn't work very well so it might not be a good example, but imagine a perfect thermostat that you set for a temperature and then the temperature stays the same inside the room no matter what the temperature is outside.

可能你根本就不理卧室里的恒温器,有些人去调它,有些人就置之不理,可能它压根就是坏的,所以这个例子也许并不恰当,但你还是想象一个完美运行的恒温器,你设定温度后房间里的温度就保持不变,不管外面温度是多少

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In addition, the digital thermostat at Shirley's home had been replaced by a slide-switch thermostat that "will produce a spark when the thermostat reaches a specified temperature, " the probable cause affidavit says.

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Heat pumps sometimes break, and they can have a hard time quickly boosting the temperature when you raise the thermostat.

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Imagine teaching the thermostat in your house to lower the temperature when you leave to save energy, and warm the house upon your arrival.

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