thermal refined structure

例句：

1. 1. The thermal conductivity of the material is high.
   这种材料的热导率很高。
2. 2.Thermal energy is a form of energy that can be converted into other forms of energy.
   热能是一种可以转化为其他形式的能量。
3. 3. Thermal expansion is the change in volume of a solid when it is heated or cooled.
   热膨胀是固体在加热或冷却时体积的变化。