And people active in water-sports like to dive and row boats in kelp forests.

VOA: special.2009.08.25

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