And that property could be the volume, like if you have a mercury thermometer , the volume of the mercury.

这种性质可以是体积，如果你有水银温度计,水银的体积。

麻省理工公开课 - 热力学与动力学课程节选

So, the active part of the thermometer could be water. It could be alcohol, mercury, it could be a piece of metal.

那么温度计的工作部分,可以是水可以是酒精，水银，可以是一块金属。

麻省理工公开课 - 热力学与动力学课程节选