thermal polymerization

例句：

1. 1. The thermal conductivity of the material is very high.
   这种材料的热导率非常高。
2. 2. Thermal energy is the energy of motion and change.
   热能是运动和变化的能量。
3. 3.Thermal expansion is a phenomenon where the volume of a substance increases with temperature.
   热膨胀是一种现象，物质的体积随着温度的增加而增加。