thermal calculation

例句：

1. 1. The temperature dropped significantly during the night.
   夜间温度显著下降。
2. 2. Heat conduction is a fundamental principle of thermodynamics.
   热传导是热力学的一个基本原理。
3. 3. The thermal efficiency of the engine was tested before installation.
   在安装之前，对发动机的热效率进行了测试。