thermal value

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.The thermal efficiency of the engine was improved by 20%.
   发动机的热效率提高了20%。
3. 3. Thermal radiation is a form of energy transfer that occurs between objects without direct contact.
   热辐射是一种无需直接接触就能发生的能量传递形式。