constant entropy line

例句：

1. 1. The constant entropy line is acritical concept in the study of thermodynamics.
   常熵线是热力学研究中的一个重要概念。
2. 2. The constant entropy line is usedto determine the optimal operating point for asystem.
   常熵线用于确定系统的最优运行点。
3. 3. The constant entropy line is afundamental principle in the design of thermodynamicsystems.
   常熵线是设计热动力学系统的基本原理。